Hmmmm, I just got mine from Ed last weekend. I think you want to look for them to be alert, clean eyes, nice coat, etc. Probably want to start with the youngest looking ones. I'm starting with 1.2, but many do 1.3. Actually, I lied - I'm starting with 2.2. Ed suggested having a back-up male. Right now they all get along just fine. If one keeps getting kicked out and beat up - he'll likely be fed off. If they get along fine, I'll let him stay. They are just too darned cute - and SOOOO much better than mice (to me).

Ed's line (which came from Tim Bailey's line) are pretty docile for the most part.