That's a good age! All mine were rescues, and most were probably from pet shops originally, so my oldest rats reached around 2.5 or 3. I had several that died suddenly of unexplained causes at less than a year old. I have a lot of regrets and horrible memories, but also a lot of good memories, too. My bf couldn't take the heartache anymore, though, and it was getting harder to pay vet bills, so we decided not to get more....for a while. My bf doesn't want pets ever again, but I'd like more rats someday.