Itchy dog needs help!

[coyote]

I don't mean to nit pick, but- a Jack russell must weigh about what, 12 pounds?
A human weighs about ten to fifteen times that much. If you give a 1/2 tablet of Benedryl to a dog that size I'd think it would be a huge overdose. I would ask the vet first.

We have a dog with allergies. The first time the vet said that we could give him a couple of Benadryl a day I was freaked. He said that dogs metabolize it differently.