I still use it for any of my birds because it works very good. I don’t know if it’s banned for cows and pigs but get it from out vet who works with cows and livestock. They keep it in stock so I’m assuming it’s still legal for cows and pigs.
There's a long withdrawal period when used in many livestock species, and for current regulations, look at the FARAD.org website.
Chickens and ducks producing eggs are a different situation, because products used on them will be present in their eggs, sometimes for a very long time. It's about the eggs!!!
Baytril is not allowed in lactating dairy cows, and in non-lactating cattle, there's a 28 day withdrawal before using them for meat. Fluoroquinolones are important drugs against human bacterial infections, and we all want them to work when we need them!
Legally they are still livestock, and it's best to know what the regulations are for them. What you actually do might be different, and that's up to you.
What do you do with those eggs?
It's about developing antibiotic resistant bacteria in your environment, and at least think carefully before using them.