I seemed to have missed this when posting in this thread for the first time, it contains the "hide" effect you mentioned. interaction_standard.txt
[INTERACTION:CLEANING]
[I_SOURCE:CREATURE_ACTION]
[I_TARGET:A:CREATURE]
[IT_LOCATION:CONTEXT_CREATURE]
[IT_MANUAL_INPUT:creature]
[I_EFFECT:CLEAN]
[IE_TARGET:A]
[IE_IMMEDIATE]
[IE_GRIME_LEVEL:2]
[IE_SYNDROME_TAG:SYN_INGESTED]
[INTERACTION:BP_BUMP]
[I_SOURCE:CREATURE_ACTION]
[I_TARGET:A:CREATURE]
[IT_LOCATION:CONTEXT_BP]
[I_TARGET:B:CREATURE]
[IT_LOCATION:CONTEXT_CREATURE]
[IT_MANUAL_INPUT:creature]
[I_EFFECT:CONTACT]
[IE_TARGET:A]
[IE_TARGET:B]
[IE_IMMEDIATE]
[INTERACTION:MATERIAL_EMISSION]
[I_SOURCE:CREATURE_ACTION]
[I_TARGET:A:MATERIAL]
[IT_MATERIAL:CONTEXT_MATERIAL]
[I_TARGET:B:LOCATION]
[IT_LOCATION:CONTEXT_LOCATION] <-- this is always the emitter for now
[I_TARGET:C:LOCATION]
[IT_LOCATION:CONTEXT_LOCATION]
[IT_MANUAL_INPUT:target]
[I_EFFECT:MATERIAL_EMISSION]
[IE_TARGET:A]
[IE_TARGET:B]
[IE_TARGET:C]
[IE_IMMEDIATE]
[INTERACTION:MATERIAL_EMISSION_WITH_HIDE_EFFECT]
[I_SOURCE:CREATURE_ACTION]
[I_TARGET:A:MATERIAL]
[IT_MATERIAL:CONTEXT_MATERIAL]
[I_TARGET:B:LOCATION]
[IT_LOCATION:CONTEXT_LOCATION]
[I_TARGET:C:LOCATION]
[IT_LOCATION:CONTEXT_LOCATION]
[I_TARGET:D:CREATURE]
[IT_LOCATION:CONTEXT_CREATURE]
[I_EFFECT:MATERIAL_EMISSION]
[IE_TARGET:A]
[IE_TARGET:B]
[IE_TARGET:C]
[IE_IMMEDIATE]
[I_EFFECT:HIDE]
[IE_TARGET:D]
[IE_IMMEDIATE]
[IE_LOCATION:IN_WATER]
It looks like, if you get a FB with deadly blood, your cats will lick it off of your dwarves but then feel its effects. Oh, god.