Is adoption free for every animal? Or do I have to pay something?

You would have to pay something.

Depends on age, the older the pet v the least amount it would cost. I went there and they didn't have any dogs, I wound up going to bydawee shelter in the city and they charge about $350.00 that includes all shots and spayed or nutured. It was a quick process compared same day about 3hrs total. If your a veteran there is no cost but you have to pay about $12.00 for the paperwork. Happy adopting.