have you gone mad it says fill bottles with water and freeze it then put it in with there bedding, i feel sorry for your ferrets to have a numpty of a keeper.
dear drw81, as you have not kept ferrets as long as some of us on this site, some as long as a couple of minutes and have kept up to several hundred ferrets due to the thawing out of the ferrets some just dont dry to the high standard we are use to, i will forgive your personal pm just this once please keep taking the happy pills and sense of humour ones as they really do work all the best and happy ferret freezing phil