I am planning on getting a pair of female rats sometime very soon, I already have a cage and toys and everything. But I do also live with two cats. At first I didn't think it would be a problem, I've had guinea pigs and hamsters in the past, and my cat wasn't interested in the hamsters and was a little afraid of the guinea pigs. So I know the cats won't be going to Sylvester-like lengths to get at the rats. But I'm wondering if the presence of cats would be stressful on the rats. Of course I would never have them all in the same place unsupervised, and I'm sure not even supervised, just in case. But I'm not sure how strong that predator/prey instinct is in rats, and whether or not they would be okay with cats nearby most of the time while they're in their cage. Maybe I'm worried over nothing, but I just want to make sure ^_^