My two sweeties never leave their cage either. I also have 2 dogs and 2 cats who would love to get a chance at my darling birdies. They are very happy as they are. Their cage is very large and they often have short bursts of flight witin the cage. I live in Florida and during the fall and spring the doors are always open and if my darlings had free range they would fly into the lanai and probably wind up in the pool. Not all households are safe for birds except in their cages.It would be best to get another cage, even if you clean off the rust it will return, it is very sad that your birds do not get any out of the cage time, this is not good for their health.