I have a serious problem with my pitbull constantly breaking out of his Cage. He has a serious anxiety issue and cannot be left alone for a long (or even short) period of time. I have come home to my room completely obliterated because he chews on my stuff and poops and pees in my room for revenge. It got to the point where I was ready to get rid of him but then my dad suggested using zip ties to hold his Cage together. At first I didn't think it would work but I took is advice and tied zip ties on Every single weak spot where the cage came together and snipped off the ends. The best part, you can't even tell they're there because they're black and match perfectly with the black Cage.
Just make sure you add a few on a really long edge like I did otherwise it won't work.