Lucretia,
I, too, find pet play (especially human dogs) to be quite the turn on. I don't know if you read F/f erotica but there is a great scene in Kelly's Slave (Part 10). If you like pony play, Couture's Dixie Chicks Rule is a runaway favorite.

I'm hoping to post a story soon on puppy play. I've got to finish my current Regency tale first, though.

Good luck,
ER