Stupid men

So my boyfriend snuck his dog into his apartment and never told them he had a dog. It peed several times on the carpet and if you kneel down and smell you can tell. We’re moving in together and doing everything we’re supposed to do at our new place. I’m assuming they’ll find out when the change the carpets.

How much can they charge him? I’m sure they’ll keep the deposit but can they charge him a lot more? We live in Kansas and he paid the entire months rent for a deposit.

And YES I KNOW HE WAS DUMB. I’d just like an answer to my question instead of “he’ll get what he deserves” or some crap.