Zoophilia means sexual attraction to animals. Sexual attraction to animals pooping is sexual attraction to animals, as I've sought content of animals pooping: not humans. Coprophiles aren't inherently zoophiles, and zoophiles aren't inherently coprophiles, so enjoyment can be separate. Like not all coprophiles are turned on by animals popping for a variety of reasons, one of them being because they're not zoophiles.
No scat isn't a reasonable rule. It's kink-shaming something totally harmless that any pet owner will have to deal with at one point or another, and AFAIK, jurisdictions that outlawed bestiality porn don't cover porn with scat contact. Likewise, no bestiality laws I know of cover contact with feces. Likewise, if bestiality harms animals psychologically (I'm not entirely sure), playing with their poop sure as hell doesn't. An act that reduces the risk of abuse to animals beyond anything that could legally be defined as bestiality ever could shouldn't be banned. Make a separate subforum if you must.
Also, I don't fw this attitude. This is like the people who say "animals can't consent because of pheromone signals". It's vague and not debate logic.