I have a cage with 1.5-inch by 1.5-inch spacing. I haven't had an escapee yet but I don't want to push my luck since we also have a cat in the house most of the day, who gets along fine with the rats but I still wouldn't want them together unsupervised. Would window screen mesh be suitable if I just lapped it over the cage and zipped it on tight? Could this catch tiny rat toenails or, what are some other steps I could take to escape proof the cage? thanks.