LAtly I knoticed when my husband had coconut rum squeaker ran to the cup and started drinking out of it. I took it away right away and he tryed to chase the cup to drink more. Then my husband had gunniss we werent to worried with the really bitter tast, First she went for it and we watched to see what she would do, Of course she started to drink as fast as she could we took it awat anf like squeek she chased the cup. We put the cup in another place squeek cane and started to drink too. Do they prefer the task. I know it cant be good for them. Any one else have this problem?

Nope, can't say that I have that problem, though certainly they're approaching due to the smell. I'm not sure how the Brewer's yeast smell carries over....but Brewer's yeast can increase appetites in sick ferrets if you sprinkle a bit on their food. I wouldn't recommend this without a vet visit though if your ferts have issues.

Brewer's yeast is an ingredient in many dry kibble type foods.

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"Dogs are followers, cats are self-absorbed, ferrets just are."

Probably enjoys the taste/smell. They're all individuals - some like things that others don't.