To H.R. Bucley who borught up the subject of Proban - I am gland that you don't use it in the ferret. For everyone who is not familiar with Proban, it is an ingested organophosphate which gets into the flea when it bites the dogs. After several bites, the flea gets enough organophosphate to kill it. I have never been a fan of this drug, and I've never really thought that it worked. There are several major flaws with it - 1) it's toxic, and if you add a flea collar, or an organophosphate shampoo, you can get a poisoned animal fairly readily. 2) A lot of people use it in dogs or cats with flea bite allergies, and since the fleas HAVE to bite the dog to get the poison, then the dog's allergy starts up and he's miserable anyway. And in my personal experience, it just doesn't work in dogs or cats. I've tried it. But a lot of people swear by it (and I think most of them are so convinced it SHOULD work, that they don't really take a close look at the dog for fleas. For ferrets, it's definitely not recommended. Too toxic. Bruce Williams, DVM [log in to unmask] OR [log in to unmask] Bruce Williams, DVM, DACVP Department of Veterinary Pathology [log in to unmask] Armed Forces Institute of Pathology [log in to unmask] Washington, D.C. 20306-6000 (202) 782-2600/2602 [Posted in FML issue 1171]