Pat St Louis, MO 8/28/2008 9:57:14 AM I've got a dog whose severe allergies kick up every August into September. And this article is right--sometimes only prednisone will do. But owners should be advised that prednisone makes dogs drink like a fish. And what goes in must come out. In other words, don't be surprised if Fido starts pee-ing on the carpet. He can't help it. If you drank that much, you'd be going wee-wee all day and night too!