diff --git a/code/__DEFINES/mob.dm b/code/__DEFINES/mob.dm
index 9f9d1d15c94..2bdb3432f69 100644
--- a/code/__DEFINES/mob.dm
+++ b/code/__DEFINES/mob.dm
@@ -94,3 +94,7 @@
 #define DEFAULT_ITEM_PUTON_DELAY		20  //time taken (in deciseconsd) to reverse-strip somebody
 
 #define IGNORE_ACCESS -1
+
+#define CHEM_MOB_SPAWN_INVALID   0
+#define CHEM_MOB_SPAWN_HOSTILE   1
+#define CHEM_MOB_SPAWN_FRIENDLY  2
\ No newline at end of file
diff --git a/code/game/gamemodes/blob/blobs/blob_mobs.dm b/code/game/gamemodes/blob/blobs/blob_mobs.dm
index fbaadbd8ec8..a35505470fa 100644
--- a/code/game/gamemodes/blob/blobs/blob_mobs.dm
+++ b/code/game/gamemodes/blob/blobs/blob_mobs.dm
@@ -40,7 +40,7 @@
 	var/obj/effect/blob/factory/factory = null
 	var/list/human_overlays = list()
 	var/is_zombie = 0
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/blob/blobspore/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume)
 	..()
@@ -161,7 +161,7 @@
 	maxbodytemp = 360
 	force_threshold = 10
 	environment_smash = 3
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 
 /mob/living/simple_animal/hostile/blob/blobbernaut/blob_act()
diff --git a/code/modules/events/tear.dm b/code/modules/events/tear.dm
index dcaad24f853..e409f6592d8 100644
--- a/code/modules/events/tear.dm
+++ b/code/modules/events/tear.dm
@@ -44,7 +44,7 @@
 		var/list/tear_critters = list()
 		for(var/T in typesof(/mob/living/simple_animal))
 			var/mob/living/simple_animal/SA = T
-			if(initial(SA.gold_core_spawnable) == 1)
+			if(initial(SA.gold_core_spawnable) == CHEM_MOB_SPAWN_HOSTILE)
 				tear_critters += T
 
 		for(var/i in 1 to 5)
diff --git a/code/modules/mob/living/simple_animal/friendly/butterfly.dm b/code/modules/mob/living/simple_animal/friendly/butterfly.dm
index ce36d85ce30..60aad72ab36 100644
--- a/code/modules/mob/living/simple_animal/friendly/butterfly.dm
+++ b/code/modules/mob/living/simple_animal/friendly/butterfly.dm
@@ -18,7 +18,7 @@
 	pass_flags = PASSTABLE | PASSGRILLE | PASSMOB
 	ventcrawler = 2
 	butcher_results = list(/obj/item/weapon/reagent_containers/food/snacks/meat = 0)
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/butterfly/New()
 	..()
diff --git a/code/modules/mob/living/simple_animal/friendly/cat.dm b/code/modules/mob/living/simple_animal/friendly/cat.dm
index 29f288b7c67..c77d117bad4 100644
--- a/code/modules/mob/living/simple_animal/friendly/cat.dm
+++ b/code/modules/mob/living/simple_animal/friendly/cat.dm
@@ -20,7 +20,7 @@
 	response_help  = "pets"
 	response_disarm = "gently pushes aside"
 	response_harm   = "kicks"
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 //RUNTIME IS ALIVE! SQUEEEEEEEE~
 /mob/living/simple_animal/pet/cat/Runtime
@@ -33,7 +33,7 @@
 	gender = FEMALE
 	var/turns_since_scan = 0
 	var/mob/living/simple_animal/mouse/movement_target
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 /mob/living/simple_animal/pet/cat/Runtime/handle_automated_action()
 	..()
@@ -99,4 +99,4 @@
 	faction = list("syndicate")
 	var/turns_since_scan = 0
 	var/mob/living/simple_animal/mouse/movement_target
-	gold_core_spawnable = 0
\ No newline at end of file
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
\ No newline at end of file
diff --git a/code/modules/mob/living/simple_animal/friendly/corgi.dm b/code/modules/mob/living/simple_animal/friendly/corgi.dm
index 520b7af0e01..7be60d7d5d6 100644
--- a/code/modules/mob/living/simple_animal/friendly/corgi.dm
+++ b/code/modules/mob/living/simple_animal/friendly/corgi.dm
@@ -26,7 +26,7 @@
 	var/obj/item/inventory_head
 	var/obj/item/inventory_back
 	var/facehugger
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/pet/corgi/New()
 	..()
@@ -398,7 +398,7 @@
 	response_help  = "pets"
 	response_disarm = "bops"
 	response_harm   = "kicks"
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 /mob/living/simple_animal/pet/corgi/Ian/process_ai()
 	..()
@@ -555,7 +555,7 @@
 	response_harm   = "kicks"
 	var/turns_since_scan = 0
 	var/puppies = 0
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 //Lisa already has a cute bow!
 /mob/living/simple_animal/pet/corgi/Lisa/Topic(href, href_list)
diff --git a/code/modules/mob/living/simple_animal/friendly/crab.dm b/code/modules/mob/living/simple_animal/friendly/crab.dm
index 0777771b235..70639291ab9 100644
--- a/code/modules/mob/living/simple_animal/friendly/crab.dm
+++ b/code/modules/mob/living/simple_animal/friendly/crab.dm
@@ -22,7 +22,7 @@
 	var/obj/item/inventory_mask
 	can_hide = 1
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/crab/handle_automated_movement()
 	//CRAB movement
@@ -47,7 +47,7 @@
 	response_help  = "pets"
 	response_disarm = "gently pushes aside"
 	response_harm   = "stomps"
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 //LOOK AT THIS - ..()??
 /*/mob/living/simple_animal/crab/attackby(var/obj/item/O as obj, var/mob/user as mob, params)
diff --git a/code/modules/mob/living/simple_animal/friendly/deer.dm b/code/modules/mob/living/simple_animal/friendly/deer.dm
index c55b5fc6850..034fa07b6fb 100644
--- a/code/modules/mob/living/simple_animal/friendly/deer.dm
+++ b/code/modules/mob/living/simple_animal/friendly/deer.dm
@@ -15,4 +15,4 @@
 	response_disarm = "gently pushes aside"
 	response_harm = "kicks"
 	can_collar = 1
-	gold_core_spawnable = 2
\ No newline at end of file
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
\ No newline at end of file
diff --git a/code/modules/mob/living/simple_animal/friendly/farm_animals.dm b/code/modules/mob/living/simple_animal/friendly/farm_animals.dm
index a1c5bf16dd7..863141e5e83 100644
--- a/code/modules/mob/living/simple_animal/friendly/farm_animals.dm
+++ b/code/modules/mob/living/simple_animal/friendly/farm_animals.dm
@@ -111,7 +111,7 @@
 	health = 50
 	var/milk_content = 0
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/cow/New()
 	..()
@@ -179,7 +179,7 @@
 	small = 1
 	can_hide = 1
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/chick/New()
 	..()
@@ -222,7 +222,7 @@ var/global/chicken_count = 0
 	small = 1
 	can_hide = 1
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/chicken/New()
 	..()
@@ -300,7 +300,7 @@ var/global/chicken_count = 0
 	attacktext = "kicks"
 	health = 50
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/turkey
 	name = "turkey"
@@ -322,7 +322,7 @@ var/global/chicken_count = 0
 	attacktext = "pecks"
 	health = 50
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/goose
 	name = "goose"
@@ -344,7 +344,7 @@ var/global/chicken_count = 0
 	attacktext = "kicks"
 	health = 50
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/seal
 	name = "seal"
@@ -366,7 +366,7 @@ var/global/chicken_count = 0
 	attacktext = "kicks"
 	health = 50
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/walrus
 	name = "walrus"
@@ -388,4 +388,4 @@ var/global/chicken_count = 0
 	attacktext = "kicks"
 	health = 50
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
diff --git a/code/modules/mob/living/simple_animal/friendly/fox.dm b/code/modules/mob/living/simple_animal/friendly/fox.dm
index b7555301c18..5bf03f083a2 100644
--- a/code/modules/mob/living/simple_animal/friendly/fox.dm
+++ b/code/modules/mob/living/simple_animal/friendly/fox.dm
@@ -17,13 +17,13 @@
 	response_help = "pets"
 	response_disarm = "gently pushes aside"
 	response_harm = "kicks"
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 //Captain fox
 /mob/living/simple_animal/pet/fox/Renault
 	name = "Renault"
 	desc = "Renault, the Captain's trustworthy fox. I wonder what it says?"
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 //Syndi fox
 /mob/living/simple_animal/pet/fox/Syndifox
@@ -35,4 +35,4 @@
 	icon_resting = "Syndifox_rest"
 	flags = NO_BREATHE
 	faction = list("syndicate")
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
diff --git a/code/modules/mob/living/simple_animal/friendly/lizard.dm b/code/modules/mob/living/simple_animal/friendly/lizard.dm
index e4aab2ed47e..b5c0ccedeae 100644
--- a/code/modules/mob/living/simple_animal/friendly/lizard.dm
+++ b/code/modules/mob/living/simple_animal/friendly/lizard.dm
@@ -22,4 +22,4 @@
 	can_hide = 1
 	butcher_results = list(/obj/item/weapon/reagent_containers/food/snacks/meat = 1)
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
diff --git a/code/modules/mob/living/simple_animal/friendly/mouse.dm b/code/modules/mob/living/simple_animal/friendly/mouse.dm
index 3d090de3144..90c4c0f06ec 100644
--- a/code/modules/mob/living/simple_animal/friendly/mouse.dm
+++ b/code/modules/mob/living/simple_animal/friendly/mouse.dm
@@ -31,7 +31,7 @@
 	can_hide = 1
 	holder_type = /obj/item/weapon/holder/mouse
 	can_collar = 1
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/mouse/handle_automated_speech()
 	..()
@@ -145,4 +145,4 @@
 	response_help  = "pets"
 	response_disarm = "gently pushes aside"
 	response_harm   = "splats"
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
diff --git a/code/modules/mob/living/simple_animal/friendly/pug.dm b/code/modules/mob/living/simple_animal/friendly/pug.dm
index 4b25505561b..ec8a38509f1 100644
--- a/code/modules/mob/living/simple_animal/friendly/pug.dm
+++ b/code/modules/mob/living/simple_animal/friendly/pug.dm
@@ -17,7 +17,7 @@
 	response_disarm = "bops"
 	response_harm   = "kicks"
 	see_in_dark = 5
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/pet/pug/process_ai()
 	..()
diff --git a/code/modules/mob/living/simple_animal/friendly/tomato.dm b/code/modules/mob/living/simple_animal/friendly/tomato.dm
index 998071443f3..ca135fe87be 100644
--- a/code/modules/mob/living/simple_animal/friendly/tomato.dm
+++ b/code/modules/mob/living/simple_animal/friendly/tomato.dm
@@ -15,4 +15,4 @@
 	harm_intent_damage = 5
 	pass_flags = PASSTABLE
 	can_hide = 1
-	gold_core_spawnable = 2
\ No newline at end of file
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
\ No newline at end of file
diff --git a/code/modules/mob/living/simple_animal/hostile/alien.dm b/code/modules/mob/living/simple_animal/hostile/alien.dm
index ff2f03d74cf..80571d2eef8 100644
--- a/code/modules/mob/living/simple_animal/hostile/alien.dm
+++ b/code/modules/mob/living/simple_animal/hostile/alien.dm
@@ -29,7 +29,7 @@
 	see_in_dark = 8
 	see_invisible = SEE_INVISIBLE_MINIMUM
 	heat_damage_per_tick = 20
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 
 /mob/living/simple_animal/hostile/alien/drone
@@ -128,7 +128,7 @@
 	move_to_delay = 4
 	maxHealth = 400
 	health = 400
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 /obj/item/projectile/neurotox
 	name = "neurotoxin"
@@ -153,7 +153,7 @@
 	icon_state = "maid"
 	icon_living = "maid"
 	icon_dead = "maid_dead"
-	gold_core_spawnable = 0 //no fun allowed
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID //no fun allowed
 
 /mob/living/simple_animal/hostile/alien/maid/AttackingTarget()
 	if(istype(target, /atom/movable))
diff --git a/code/modules/mob/living/simple_animal/hostile/bat.dm b/code/modules/mob/living/simple_animal/hostile/bat.dm
index eaae85b5eb2..bbdf639c0f4 100644
--- a/code/modules/mob/living/simple_animal/hostile/bat.dm
+++ b/code/modules/mob/living/simple_animal/hostile/bat.dm
@@ -29,7 +29,7 @@
 
 	faction = list("scarybat")
 	var/mob/living/owner
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/scarybat/New(loc, mob/living/L as mob)
 	..()
diff --git a/code/modules/mob/living/simple_animal/hostile/bear.dm b/code/modules/mob/living/simple_animal/hostile/bear.dm
index b9fce10e8f0..f55c4ce98d6 100644
--- a/code/modules/mob/living/simple_animal/hostile/bear.dm
+++ b/code/modules/mob/living/simple_animal/hostile/bear.dm
@@ -31,7 +31,7 @@
 	var/stance_step = 0
 
 	faction = list("russian")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 //SPACE BEARS! SQUEEEEEEEE~     OW! FUCK! IT BIT MY HAND OFF!!
 /mob/living/simple_animal/hostile/bear/Hudson
diff --git a/code/modules/mob/living/simple_animal/hostile/carp.dm b/code/modules/mob/living/simple_animal/hostile/carp.dm
index 2c971649e64..ddd302c3e8c 100644
--- a/code/modules/mob/living/simple_animal/hostile/carp.dm
+++ b/code/modules/mob/living/simple_animal/hostile/carp.dm
@@ -33,7 +33,7 @@
 
 	faction = list("carp")
 	flying = 1
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/carp/Process_Spacemove(var/movement_dir = 0)
 	return 1	//No drifting in space for space carp!	//original comments do not steal
@@ -54,7 +54,7 @@
 	icon_state = "holocarp"
 	icon_living = "holocarp"
 	maxbodytemp = INFINITY
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 /mob/living/simple_animal/hostile/carp/holocarp/death()
 	..()
diff --git a/code/modules/mob/living/simple_animal/hostile/creature.dm b/code/modules/mob/living/simple_animal/hostile/creature.dm
index 24c4eede1de..50aa20b60d0 100644
--- a/code/modules/mob/living/simple_animal/hostile/creature.dm
+++ b/code/modules/mob/living/simple_animal/hostile/creature.dm
@@ -13,5 +13,5 @@
 	attacktext = "chomps"
 	attack_sound = 'sound/weapons/bite.ogg'
 	faction = list("creature")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
diff --git a/code/modules/mob/living/simple_animal/hostile/faithless.dm b/code/modules/mob/living/simple_animal/hostile/faithless.dm
index 1f496c8347c..a14efc6d279 100644
--- a/code/modules/mob/living/simple_animal/hostile/faithless.dm
+++ b/code/modules/mob/living/simple_animal/hostile/faithless.dm
@@ -25,7 +25,7 @@
 	speed = 4
 
 	faction = list("faithless")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/faithless/Process_Spacemove(var/movement_dir = 0)
 	return 1
diff --git a/code/modules/mob/living/simple_animal/hostile/giant_spider.dm b/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
index 088155c25aa..bb381f24be1 100644
--- a/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
+++ b/code/modules/mob/living/simple_animal/hostile/giant_spider.dm
@@ -49,7 +49,7 @@
 	move_to_delay = 6
 	attacktext = "bites"
 	attack_sound = 'sound/weapons/bite.ogg'
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 //nursemaids - these create webs and eggs
 /mob/living/simple_animal/hostile/poison/giant_spider/nurse
diff --git a/code/modules/mob/living/simple_animal/hostile/headcrab.dm b/code/modules/mob/living/simple_animal/hostile/headcrab.dm
index 5aa075a8cc5..b2b6d9ff716 100644
--- a/code/modules/mob/living/simple_animal/hostile/headcrab.dm
+++ b/code/modules/mob/living/simple_animal/hostile/headcrab.dm
@@ -21,7 +21,7 @@
 	ventcrawler = 2
 	var/datum/mind/origin
 	var/egg_lain = 0
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/headcrab/proc/Infect(mob/living/carbon/victim)
 	var/obj/item/organ/internal/body_egg/changeling_egg/egg = new(victim)
diff --git a/code/modules/mob/living/simple_animal/hostile/hivebot.dm b/code/modules/mob/living/simple_animal/hostile/hivebot.dm
index 7116d49fb55..3ccbb9abec2 100644
--- a/code/modules/mob/living/simple_animal/hostile/hivebot.dm
+++ b/code/modules/mob/living/simple_animal/hostile/hivebot.dm
@@ -21,7 +21,7 @@
 	atmos_requirements = list("min_oxy" = 0, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0)
 	minbodytemp = 0
 	speak_emote = list("states")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/hivebot/range
 	name = "Hivebot"
diff --git a/code/modules/mob/living/simple_animal/hostile/jungle_animals.dm b/code/modules/mob/living/simple_animal/hostile/jungle_animals.dm
index 75ecdf79511..85268dee619 100644
--- a/code/modules/mob/living/simple_animal/hostile/jungle_animals.dm
+++ b/code/modules/mob/living/simple_animal/hostile/jungle_animals.dm
@@ -30,7 +30,7 @@
 
 	layer = 3.1		//so they can stay hidde under the /obj/structure/bush
 	var/stalk_tick_delay = 3
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/panther/ListTargets()
 	var/list/targets = list()
@@ -88,7 +88,7 @@
 
 	layer = 3.1		//so they can stay hidde under the /obj/structure/bush
 	var/stalk_tick_delay = 3
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/snake/ListTargets()
 	var/list/targets = list()
diff --git a/code/modules/mob/living/simple_animal/hostile/mimic.dm b/code/modules/mob/living/simple_animal/hostile/mimic.dm
index ab83a592e1f..7cff96385e1 100644
--- a/code/modules/mob/living/simple_animal/hostile/mimic.dm
+++ b/code/modules/mob/living/simple_animal/hostile/mimic.dm
@@ -30,7 +30,7 @@
 	move_to_delay = 9
 
 	var/is_electronic = 0
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/mimic/FindTarget()
 	. = ..()
@@ -140,7 +140,7 @@ var/global/list/protected_objects = list(/obj/structure/table, /obj/structure/ca
 	var/mob/living/creator = null // the creator
 	var/destroy_objects = 0
 	var/knockdown_people = 0
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 /mob/living/simple_animal/hostile/mimic/copy/New(loc, var/obj/copy, var/mob/living/creator, var/destroy_original = 0)
 	..(loc)
diff --git a/code/modules/mob/living/simple_animal/hostile/poison_bees.dm b/code/modules/mob/living/simple_animal/hostile/poison_bees.dm
index 6bb6efc003d..c8a6a79fb04 100644
--- a/code/modules/mob/living/simple_animal/hostile/poison_bees.dm
+++ b/code/modules/mob/living/simple_animal/hostile/poison_bees.dm
@@ -24,7 +24,7 @@
 	//Spaceborn beings don't get hurt by space
 	atmos_requirements = list("min_oxy" = 0, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0)
 	minbodytemp = 0
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/poison/bees/Process_Spacemove(var/check_drift = 0)
 	return 1
diff --git a/code/modules/mob/living/simple_animal/hostile/syndicate.dm b/code/modules/mob/living/simple_animal/hostile/syndicate.dm
index 1c869805a03..3a9d9e46aa6 100644
--- a/code/modules/mob/living/simple_animal/hostile/syndicate.dm
+++ b/code/modules/mob/living/simple_animal/hostile/syndicate.dm
@@ -132,7 +132,7 @@
 	atmos_requirements = list("min_oxy" = 0, "max_oxy" = 0, "min_tox" = 0, "max_tox" = 0, "min_co2" = 0, "max_co2" = 0, "min_n2" = 0, "max_n2" = 0)
 	minbodytemp = 0
 	flying = 1
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/viscerator/death()
 	..()
diff --git a/code/modules/mob/living/simple_animal/hostile/tree.dm b/code/modules/mob/living/simple_animal/hostile/tree.dm
index 361cea751ad..bd39b681978 100644
--- a/code/modules/mob/living/simple_animal/hostile/tree.dm
+++ b/code/modules/mob/living/simple_animal/hostile/tree.dm
@@ -28,7 +28,7 @@
 	minbodytemp = 0
 
 	faction = list("hostile", "winter")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/tree/FindTarget()
 	. = ..()
diff --git a/code/modules/mob/living/simple_animal/hostile/winter_mobs.dm b/code/modules/mob/living/simple_animal/hostile/winter_mobs.dm
index ae176992a9e..274ba14f156 100644
--- a/code/modules/mob/living/simple_animal/hostile/winter_mobs.dm
+++ b/code/modules/mob/living/simple_animal/hostile/winter_mobs.dm
@@ -33,7 +33,7 @@
 	bodytemperature = 73.0		//it's made of snow and hatred, so it's pretty cold.
 	maxbodytemp = 280.15		//at roughly 7 C, these will start melting (dying) from the warmth. Mind over matter or something.
 	heat_damage_per_tick = 10	//Now With Rapid Thawing Action!
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 
 /mob/living/simple_animal/hostile/winter/snowman/death()
@@ -64,7 +64,7 @@
 
 	melee_damage_lower = 5
 	melee_damage_upper = 10
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/winter/santa
 	maxHealth = 150		//if this seems low for a "boss", it's because you have to fight him multiple times, with him fully healing between stages
diff --git a/code/modules/mob/living/simple_animal/parrot.dm b/code/modules/mob/living/simple_animal/parrot.dm
index 33372a9904f..3096a85e39b 100644
--- a/code/modules/mob/living/simple_animal/parrot.dm
+++ b/code/modules/mob/living/simple_animal/parrot.dm
@@ -82,7 +82,7 @@
 
 	//Parrots are kleptomaniacs. This variable ... stores the item a parrot is holding.
 	var/obj/item/held_item = null
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 
 /mob/living/simple_animal/parrot/New()
@@ -683,7 +683,7 @@
 	name = "Poly"
 	desc = "Poly the Parrot. An expert on quantum cracker theory."
 	speak = list("Poly wanna cracker!", ":eCheck the singlo, you chucklefucks!",":eCheck the tesla, you shits!",":eSTOP HOT-WIRING THE ENGINE, FUCKING CHRIST!",":eWire the solars, you lazy bums!",":eWHO TOOK THE DAMN HARDSUITS?",":eOH GOD ITS FREE CALL THE SHUTTLE")
-	gold_core_spawnable = 0
+	gold_core_spawnable = CHEM_MOB_SPAWN_INVALID
 
 /mob/living/simple_animal/parrot/Poly/New()
 	ears = new /obj/item/device/radio/headset/headset_eng(src)
diff --git a/code/modules/mob/living/simple_animal/simple_animal.dm b/code/modules/mob/living/simple_animal/simple_animal.dm
index bd8d6b8e740..f862b889710 100644
--- a/code/modules/mob/living/simple_animal/simple_animal.dm
+++ b/code/modules/mob/living/simple_animal/simple_animal.dm
@@ -67,7 +67,7 @@
 	var/scan_ready = 1
 	var/simplespecies //Sorry, no spider+corgi buttbabies.
 
-	var/gold_core_spawnable = 0 //if 1 can be spawned by plasma with gold core, 2 are 'friendlies' spawned with blood
+	var/gold_core_spawnable = CHEM_MOB_SPAWN_INVALID //if CHEM_MOB_SPAWN_HOSTILE can be spawned by plasma with gold core, CHEM_MOB_SPAWN_FRIENDLY are 'friendlies' spawned with blood
 
 	var/master_commander = null //holding var for determining who own/controls a sentient simple animal (for sentience potions).
 	var/sentience_type = SENTIENCE_ORGANIC // Sentience type, for slime potions
diff --git a/code/modules/research/xenoarchaeology/genetics/prehistoric_animals.dm b/code/modules/research/xenoarchaeology/genetics/prehistoric_animals.dm
index 50446de112d..654b1a9ccde 100644
--- a/code/modules/research/xenoarchaeology/genetics/prehistoric_animals.dm
+++ b/code/modules/research/xenoarchaeology/genetics/prehistoric_animals.dm
@@ -17,7 +17,7 @@
 	speak = list("Hruuugh!","Hrunnph")
 	emote_see = list("paws the ground","shakes its mane","stomps")
 	emote_hear = list("snuffles")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/diyaab
 	name = "diyaab"
@@ -38,7 +38,7 @@
 	speak = list("Awrr?","Aowrl!","Worrl")
 	emote_see = list("sniffs the air cautiously","looks around")
 	emote_hear = list("snuffles")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/hostile/shantak
 	name = "shantak"
@@ -58,7 +58,7 @@
 	speak_chance = 5
 	speak = list("Shuhn","Shrunnph?","Shunpf")
 	emote_see = list("scratches the ground","shakes out it's mane","tinkles gently")
-	gold_core_spawnable = 1
+	gold_core_spawnable = CHEM_MOB_SPAWN_HOSTILE
 
 /mob/living/simple_animal/yithian
 	name = "yithian"
@@ -66,7 +66,7 @@
 	icon_state = "yithian"
 	icon_living = "yithian"
 	icon_dead = "yithian_dead"
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY
 
 /mob/living/simple_animal/tindalos
 	name = "tindalos"
@@ -74,4 +74,4 @@
 	icon_state = "tindalos"
 	icon_living = "tindalos"
 	icon_dead = "tindalos_dead"
-	gold_core_spawnable = 2
+	gold_core_spawnable = CHEM_MOB_SPAWN_FRIENDLY