Since this is a constant theme here because people just can't seem to seperate fact from fantasy, let me reiterate......this is illegal in ALL states. EVERY one of them. Whether it is specifically codified or it's not makes ZERO difference. Where it's codified directly, they prosecute you inder those laws, where it isn't, they prosecute you under animal abuse laws.
Whichever the case may be, you get arrested, sometimes jailed, and often your animal gets put down, as in DEAD. What's true is that you have areas where it is more, or sometimes less zealously persued. What's 100% true across the board is that if police, ANYWHERE find evidence of you banging your animals, they WILL arrest and prosecute you.
Don't be fool enough to believe that a lack of very specific Bestiality laws makes fucking animals LEGAL. It's NOT, anywhere, regardless of specific statute or lack thereof.