Distemper was my fist thought as well. I took them to the vet and he says its coccidia and the start of an URI. They were given medications and I am to take them back on Thursday if they don't improve. The smallest weighed just 3 1/2 oz and the largest was 5 1/2 oz. they are so tiny!! temps were ok though. they were also given an ointment for their bottoms, they are irritated and swollen from sucking on each other. (sorry if tmi) thanks for being concerned.