An ex of mine knows, we were long distance at the time and she asked what my dirtiest fantasy was, "I wanna watch you get fucked by a dog then take you after" and there was a bit of stunned silence before a shy but excited "okay!" came back.
I didn't have a dog at the time though.
Next time we got together we locked ourselves in my bedroom and I put a collar and leash on her, put playlists of zoo videos up across 3 monitors, and fucked on all fours. All the time I could only think about a dig in my place. It was a wild weekend!
I think my current partner knows, I'm sure they've walked in on me watching zoo porn before, and we both have similar views on the furry/zoo crossovers.