Santa brought two to our house for our sons who are 19 and 9. Both females and they are named Dutchess and Rose. Best pet ever. This our second time with rats we took a four year break. The best tip I stumbled upon was when you clean the cage sprikle some of the old bedding on top of the new bedding. If you take all their smell away they go into pee overdrive. It has really worked I have only cleaned it three to four times. I use pine shavings so there is no masking the odor and these two are in our livingroom (haven't moved them to their room yet from christmas). Well it is nice to know I am not the only person who loves rats.