I have one rescue that has chewed through her airline crate also and bends the heck out of wire ones. she's pretty good when she's out of the crate but it aggravates two others (rescues) who are in crates, one of whom I'm not sure I would trust out with the others and I'm afraid all the aggravation will cause her to bust out of her crate (has happened before) and there will be a fight. I tried no chew spray, she licks it. I tried habanero pepper sauce, she licks it. When she is in her crate and I let her out she jumps all over me and tries to nip. She also barks furiously at one of my dogs in particular when it's time to go to bed. I've controlled that with a spray bottle with vinegar and water, it helps.