The problem with dogs running through poison oak is that the oil will stay on their fur until it is removed. The only way to prevent having to clean your dog daily would be to keep her from coming in contact with the plants in the first place, such as keeping her close on a leash or taking a different path that does not contain poison oak. To remove the oil, you can use Tecnu Original Outdoor Skin Cleanser. Saturate a cloth with Tecnu Original and wipe down her coat. Follow up with a pet shampoo and water. You want to make sure to remove all of the Tecnu so that she doesn't lick her fur and ingest it.