Well, the reason I only have one so far, is because my mom helped me buy BB, and I can't get another one until I am able to pay off my money to her, which is like 60.50 something like that. But, I will get her a new one soon. By the way, anyone here know the best treat for a rat? This is really the first time I've ever had any type of rodent, and the only treat the can have right now that I found out they can have on the internet is bits of carrots. Anything else?