If I had to say, I would bet that your snake is probably ok....you have to remember that even though it's cruel, some shippers of rodents ship their feeders with no food or water. add in the fact that mice are shipped in huge quantities in the same box, so with the warm weather we've been having, and the crowded conditions many pet stores keep their feeder mice, It could have been stressed/weakened as well as dehydrated. I have had mice collapse in the box on the way home from the store!