I don't even handle them on the same day. The snake it qt looks to be in good health and ate a F/T mouse today. She is only there because she is new, I just got her a week ago. She is on the other side of my house. All my other snakes ate today also and seem to be fine. I bumped the heat tape temps up to 94.5 F today as a precaution. I did have them set at 93 F. I have not touched any other snakes in the past week. No one touches my snakes except me (and my 3 year old. I can not be positive but no one else looks sick.