Adding some generalized reagent processing for animals.

code/modules/reagents/reagents/_reagents.dm

@@ -170,6 +170,9 @@
 	remove_self(removed)
 	return
 
+/datum/reagent/proc/affect_animal(var/mob/living/simple_mob/animal/M, var/removed)
+	return
+
 /datum/reagent/proc/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	return
 

code/modules/reagents/reagents/food_drinks.dm

@@ -36,6 +36,10 @@
 			if(data[taste]/totalFlavor < 0.1)
 				data -= taste
 
+/datum/reagent/nutriment/affect_animal(var/mob/living/simple_mob/animal/M, var/removed)
+	M.add_nutrition((nutriment_factor * removed) * M.get_dietary_food_modifier(src) * 0.5)
+	return ..()
+
 /datum/reagent/nutriment/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(!injectable && alien != IS_SLIME)
 		M.adjustToxLoss(0.1 * removed)
@@ -45,9 +49,12 @@
 
 /datum/reagent/nutriment/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
 	switch(alien)
-		if(IS_DIONA) return
-		if(IS_UNATHI) removed *= 0.5
-	if(issmall(M)) removed *= 2 // Small bodymass, more effect from lower volume.
+		if(IS_DIONA)
+			return
+		if(IS_UNATHI)
+			removed *= 0.5
+	if(issmall(M))
+		removed *= 2 // Small bodymass, more effect from lower volume.
 	if(!(M.species.allergens & allergen_type))	//assuming it doesn't cause a horrible reaction, we'll be ok!
 		M.heal_organ_damage(0.5 * removed, 0)
 		M.adjust_nutrition(nutriment_factor * removed)

code/modules/reagents/reagents/medicine.dm

@@ -52,6 +52,12 @@
 	overdose_mod = 0.25
 	scannable = 1
 
+/datum/reagent/bicaridine/affect_animal(var/mob/living/simple_mob/animal/M, var/removed)
+	if(istype(M, /mob/living/simple_mob/animal/sif/grafadreka))
+		var/mob/living/simple_mob/animal/sif/grafadreka/drake = M
+		drake.sap_heal_threshold = clamp(drake.sap_heal_threshold + (0.1 * removed), 0, 1)
+	return ..()
+
 /datum/reagent/bicaridine/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	var/chem_effective = 1 * M.species.chem_strength_heal
 	if(alien == IS_SLIME)

code/modules/reagents/reagents/toxins.dm

@@ -442,15 +442,21 @@
 	color = "#C6E2FF"
 	strength = 2
 	overdose = 20
+	var/sap_regen_power = 12
 
 /datum/reagent/toxin/sifslurry/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(alien == IS_DIONA) // Symbiotic bacteria.
 		M.adjust_nutrition(strength * removed)
 		return
-	else
-		M.add_modifier(/datum/modifier/slow_pulse, 30 SECONDS)
+	M.add_modifier(/datum/modifier/slow_pulse, 30 SECONDS)
 	..()
 
+/datum/reagent/toxin/sifslurry/affect_animal(var/mob/living/simple_mob/animal/M, var/removed)
+	if(istype(M, /mob/living/simple_mob/animal/sif/grafadreka))
+		var/mob/living/simple_mob/animal/sif/grafadreka/drake = M
+		drake.add_sap(removed * sap_regen_power)
+	return ..()
+
 /datum/reagent/toxin/sifslurry/overdose(var/mob/living/carbon/M, var/alien, var/removed) // Overdose effect.
 	if(alien == IS_DIONA)
 		return