I'm not a vet, but as BIG mentioned, some have been known to prescribe DES for incontinent dogs - my Dobie had this problem and DES worked just fine for him. I would assume the dosage for a Doberman would not be the same as for a ferret, and maybe it's not healthy for a ferret, I don't know, but it has been used successfully in dogs. Debbie Riccio WNYFLFA Rochester, NY [Posted in FML issue 1580]