Yeah, I ended up needing to put a hardware cloth patch over where they'd started to chew out one of the handles. I removed those rats from the tub, and swapped in a different group that didn't seem to be interested in chewing (might've been because it was 3 mommas and their new litters), and then I didn't have any more chewing issues. Depends on the rats, but if you want to stick with tubs investing in a box trap is a great idea (good idea anyways, loose rats are a pain, they are way too clever lol).