My labradoodle went to the groomer's yesterday and has been licking and snicking at her armpits since, and they've gone very red. It might have been the shampoo, but she spent the afternoon playing in long grass which I think may be the cause as before her skin was protected by the longer fur. Whatever it was it's clearly itching and her fussing is making it worse. Am I right in thinking you can give Piriton to dogs?