Something about blood and species.

code/modules/mob/living/carbon/human/species.dm

@@ -1264,10 +1264,10 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 	H.update_mutant_bodyparts()
 
 /datum/species/proc/handle_chemicals(datum/reagent/chem, mob/living/carbon/human/H)
-	if(chem.type == exotic_blood)
+	if(chem.type == exotic_blood && !istype(exotic_blood, /datum/reagent/blood))
 		H.blood_volume = min(H.blood_volume + round(chem.volume, 0.1), BLOOD_VOLUME_MAXIMUM)
 		H.reagents.del_reagent(chem.type)
-		return 1
+		return TRUE
 	return FALSE
 
 /datum/species/proc/check_weakness(obj/item, mob/living/attacker)

code/modules/mob/living/carbon/human/species_types/flypeople.dm

@@ -13,22 +13,23 @@
 	exotic_bloodtype = "BUG"
 
 /datum/species/fly/handle_chemicals(datum/reagent/chem, mob/living/carbon/human/H)
-	if(chem.type == /datum/reagent/toxin/pestkiller)
+	if(istype(chem, /datum/reagent/toxin/pestkiller))
 		H.adjustToxLoss(3)
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
-		return 1
-
-
-/datum/species/fly/handle_chemicals(datum/reagent/chem, mob/living/carbon/human/H)
-	if(istype(chem, /datum/reagent/consumable))
+		return TRUE
+	else if(istype(chem, /datum/reagent/consumable))
 		var/datum/reagent/consumable/nutri_check = chem
 		if(nutri_check.nutriment_factor > 0)
 			var/turf/pos = get_turf(H)
 			H.vomit(0, FALSE, FALSE, 2, TRUE)
+			var/obj/effect/decal/cleanable/vomit/V = locate() in pos
+			if(V)
+				reagents.trans_id_to(V, chem, chem.volume)
 			playsound(pos, 'sound/effects/splat.ogg', 50, 1)
 			H.visible_message("<span class='danger'>[H] vomits on the floor!</span>", \
 						"<span class='userdanger'>You throw up on the floor!</span>")
-	..()
+			return TRUE
+	return ..()
 
 /datum/species/fly/check_weakness(obj/item/weapon, mob/living/attacker)
 	if(istype(weapon, /obj/item/melee/flyswatter))

code/modules/mob/living/carbon/human/species_types/golems.dm

@@ -308,7 +308,8 @@
 	if(chem.type == /datum/reagent/toxin/plantbgone)
 		H.adjustToxLoss(3)
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
-		return 1
+		return TRUE
+	return ..()
 
 //Radioactive
 /datum/species/golem/uranium
@@ -622,12 +623,11 @@
 	if(chem.type == /datum/reagent/water/holywater)
 		H.adjustFireLoss(4)
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
-
-	if(chem.type == /datum/reagent/fuel/unholywater)
+	else if(chem.type == /datum/reagent/fuel/unholywater)
 		H.adjustBruteLoss(-4)
 		H.adjustFireLoss(-4)
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
-
+	return ..()
 
 /datum/species/golem/clockwork
 	name = "Clockwork Golem"

code/modules/mob/living/carbon/human/species_types/mushpeople.dm

@@ -57,6 +57,7 @@
 		H.adjustToxLoss(3)
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
 		return TRUE
+	return ..()
 
 /datum/species/mush/handle_mutant_bodyparts(mob/living/carbon/human/H, forced_colour)
 	forced_colour = FALSE

code/modules/mob/living/carbon/human/species_types/podpeople.dm

@@ -50,7 +50,8 @@
 	if(chem.type == /datum/reagent/toxin/plantbgone)
 		H.adjustToxLoss(3)
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
-		return 1
+		return TRUE
+	return ..()
 
 /datum/species/pod/on_hit(obj/item/projectile/P, mob/living/carbon/human/H)
 	switch(P.type)

code/modules/mob/living/carbon/human/species_types/synths.dm

@@ -39,9 +39,8 @@
 	if(chem.type == /datum/reagent/medicine/synthflesh)
 		chem.reaction_mob(H, TOUCH, 2 ,0) //heal a little
 		H.reagents.remove_reagent(chem.type, REAGENTS_METABOLISM)
-		return 1
-	else
-		return ..()
+		return TRUE
+	return ..()
 
 
 /datum/species/synth/proc/assume_disguise(datum/species/S, mob/living/carbon/human/H)