Hi, I have had my dwarf hamster for a week. We have a pets at home cage with tubes. Peanut now uses the corner tube to sleep in. Should I remove the tubes? Also I wanted to make the cage even bigger, it’s a medium size cage, with plastic base and wire top. I have seen Habitrail ovo type cages can I add this to a normal wire top cage or would I have to modify the cage. Just love Peanut so much and want her to have as much space as possible.