Easy. Personality and markings. Kiefer is friendlier and cuddlier then Sutherland and also has darker points. While Sutherland is a bit more reserved and is more inclined to do his own thing...he also does not have a point on his butt.Awww, they're twins! How do you tell them apart?
Thanks.They are adorable! You seem to get a lot of rats that are this color! I've never even seen any like this in person! Do you know how long you'll be fostering them?