Hmm, I thought about this one before I hit Post!
Unless specified, I like male and female animals virtually the same. Maybe something with a cock to pound me gets an edge animal-wise, but i'm more into females in general and a lover of all animals in general.

Shepherd-type and wolf-type dogs (GSD, dutch shep, malinois, husky etc) these are the sexiest ever to me. My first was a Dutchie/Mali mix and i still miss him...

Stallions

Muscular/guard dogs (Rottweiler, Doberman, Pitbull, Kangal, Bully Kuta...)
- Women
- Stag/Deer
- Mares
- Bulls
- Goats or Rams
- Dolphins
- Hogs
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- Men
LOL no offense meant, everything on this list is still something I am/would be sexually attracted to including men

I just much prefer human women, and for a guy, 9 times out of 10 I'll choose an animal because the nature of my attraction itself heavily involves animals. I will say somebody being a fellow zoophile catapults someone's sexiness to me.