"I lost my ferret this morning, he died suddenly and I was at a loss to why. After posting about it on a hunting forum, I was then reliably informed the nice people who make Jeyes fluid have removed the Coal tar acids and replaced it with a chemical that is lethal to ferrets, It gets in through thier paw pads, builds up and a quick death.
So this is a warning if you do use Jeyes on your ferret runs and cages!"
I read this on Fieldsports Extreme and thought it best to put it here for all to see.