Your Welcome! I know all about small door problems. Part of the reason I bought another cage. I couldn't use the traditional larger ferret litter boxes so I would buy the small cat litter box for $3 at Walmart and cut down one side for the ferts to easily get in and out of. Those litter boxes worked great for small doors and if they got too icky, I'd toss it and buy another. I love velcro, works wonders. For the bowls and litter boxes I use velcro. You could also try lock on crocks for food and water if you don't want to velcro it down. Here's the kind I use: http://www.ferretstore.com/10ozlixquicl.html

Works great. Hope you can get the new fuzz trained or if you're like me, have them train you!