If a person wants to know if dex will have negative effects on their dog, give the dog dex halfway through the keep and see how it effects the dog. Give the dog dex before the keep and pay attention to your dog. That will go a long way in telling you what you need to see about the animal. I'd used dex for many years before a show and never had any issues with it, so it's a case by case basis. It may also have to do with the amounts given.

On a previous post in this thread, I wouldn't consider a 1/2 count a dry dog personally. I've seen dogs before with a 2-3 count, and to me, those dogs were dry.