I recently had a bad experience with petstore rats(they were really sick) and had to return them. But then I came across two little girls at a different pet store that came from a breeder. they are adorable! They are babies. I also have a little older male rat too(not in with them of course). Anyways, how can I gain thier trust? One is more outgoing that the other. The other hides all the time, mostly. What can I do to make them more comfortable?