First noticed it in a soon-to-be retired breeder male. At first I thought it was just bite marks from a female that got cranky, but then it started looking more tumor like. He was the only one in his colony (1.3) that had them. I fed them all off about a month ago just because it was time. From that feeding I had my first ever regurge. All my temps/humidity/etc are spot on...I don't know if the snake that regurged got the "tumor" rat. All the other snakes ate their rats fine.

Then, I started noticing this colony. Of the 4 rats in the group, 3 have the "tumors" and one doesn't have any at all.









What do you think it is? Tumors? Warts?
Is it from in-breeding? (these rats are very inbreed...i just set up my new blood groups in the fall)
Is it a virus? If so do you think its contagious? Can I get it?
Should I cull all the rats or just the ones with the "tumors"?
Is it safe to feed them to my snakes?
Two of the females are pregnant, is it worth waiting on those babies?