Contact with poison ivy or poison oak – plants in the genus Toxicodendron - can cause serious dermatitis in dogs, and in people as well. Skin that comes into contact with these plants becomes inflamed, irritated, red and raised. read more
Dr. Perry: Poison ivy effects the skin of a dog in much the same way as it does a human. It first causes raised bumps and redness of the skin. These bumps are called papules and most closely resemble a pimple. read more