Generalizes the feed and force feed checks.

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

@@ -1,11 +1,37 @@
-/mob/living/carbon/human/proc/can_eat(var/food, var/feedback = 1)
-	if(!check_has_mouth())
-		if(feedback)
+#define HUMAN_EATING_NO_ISSUE		0
+#define HUMAN_EATING_NO_MOUTH		1
+#define HUMAN_EATING_BLOCKED_MOUTH	2
+
+/mob/living/carbon/human/can_eat(var/food, var/feedback = 1)
+	var/status = can_eat_status()
+	if(status == HUMAN_EATING_NO_ISSUE)
+		return 1
+	if(feedback)
+		if(status == HUMAN_EATING_NO_MOUTH)
 			src << "Where do you intend to put \the [food]? You don't have a mouth!"
-		return 0
+		else if(status == HUMAN_EATING_BLOCKED_MOUTH)
+			src << "<span class='warning'>\The [blocked] is in the way!</span>"
+	return 0
+
+/mob/living/carbon/human/can_force_feed(var/feeder, var/food, var/feedback = 1)
+	var/status = can_eat_status()
+	if(status == HUMAN_EATING_NO_ISSUE)
+		return 1
+	if(feedback)
+		if(status == HUMAN_EATING_NO_MOUTH)
+			feeder << "Where do you intend to put \the [food]? \The [src] doesn't have a mouth!"
+		else if(status == HUMAN_EATING_BLOCKED_MOUTH)
+			feeder << "<span class='warning'>\The [blocked] is in the way!</span>"
+	return 0
+
+/mob/living/carbon/human/proc/can_eat_status()
+	if(!check_has_mouth())
+		return HUMAN_EATING_NO_MOUTH
 	var/obj/item/blocked = check_mouth_coverage()
 	if(blocked)
-		if(feedback)
-			src << "<span class='warning'>\The [blocked] is in the way!</span>"
-		return 0
-	return 1
+		return HUMAN_EATING_BLOCKED_MOUTH
+	return HUMAN_EATING_NO_ISSUE
+
+#undef HUMAN_EATING_NO_ISSUE
+#undef HUMAN_EATING_NO_MOUTH
+#undef HUMAN_EATING_BLOCKED_MOUTH

code/modules/mob/living/simple_animal/friendly/slime.dm

@@ -14,6 +14,11 @@
 	emote_see = list("jiggles", "bounces in place")
 	var/colour = "grey"
 
+/mob/living/simple_animal/slime/can_force_feed(var/feeder, var/food, var/feedback)
+	if(feedback)
+		feeder << "Where do you intend to put \the [food]? \The [src] doesn't have a mouth!"
+	return 0
+
 /mob/living/simple_animal/adultslime
 	name = "pet slime"
 	desc = "A lovable, domesticated slime."

code/modules/mob/mob_helpers.dm

@@ -619,6 +619,12 @@ proc/is_blind(A)
 /mob/proc/is_client_active(var/active = 1)
 	return client && client.inactivity < active MINUTES
 
+/mob/proc/can_eat()
+	return 1
+
+/mob/proc/can_force_feed()
+	return 1
+
 #define SAFE_PERP -50
 /mob/living/proc/assess_perp(var/obj/access_obj, var/check_access, var/auth_weapons, var/check_records, var/check_arrest)
 	if(stat == DEAD)
@@ -644,7 +650,7 @@ proc/is_blind(A)
 	// A proper	CentCom id is hard currency.
 	else if(id && istype(id, /obj/item/weapon/card/id/centcom))
 		return SAFE_PERP
-	
+
 	if(check_access && !access_obj.allowed(src))
 		threatcount += 4