I have 2 mouse cages....I thought that maybe i could join them together because my dad wont let me get another cage....The 2 mice cages are about average size....Do you think that would be enough room for 2 rats?
Depends on what you mean by 'average size' and 'mouse cage' Do you have dimensions on them? Are they solid walled? Fish tanks? Wire? Some people keep mice in tanks that are much too small for rats, even with two joined together.