I'd just like to say here that in most cases, zoosexuals don't regard their partners as "sex toys".
I can't vouch for non-zoo bestialists.
That said, if the cows/pigs being fucked instead of killed/eaten are well cared for and are not being forced or physically harmed, then yeah, it shouldn't be something that could get you thrown you in jail, put on a sex offender list, have your animals taken and potentially publically ruin your life forever. It's not a legal thing as much as it is a shaming thing.
I prefer animal consent and especially when they initiate the act instead of me, but based on the human majority's lack of concern over animal consent to anything else besides bestiality is grossly hypocritical. In fact, it's fucking stupid. Live and let live, if that's even possible. We all know most of the "animals can't consent!" anti-zoo barkers couldn't care less about the animals, it's only about their personal issues with the zoos and their "unnatural" acts.