Q: We discovered poison ivy in our woods. If our cats and dogs touch it, can it cause them problems? What if they rub up against us humans? A: Neither cats nor dogs suffer from poison ivy rash, but their coats easily transfer the oil in poison ivy, poison oak, and poison sumac to humans. This oil, called urushiol, causes the common poison ivy rash in people who are sensitive to it. I learned that the hard way when my golden retriever Sam snuggled against me after he came into contact with poison ivy that had invaded our backyard without my knowledge. My face, neck, and arms broke out in the red, itchy rash typical of poison ivy. Since then, I’ve learned that urushiol persists for years on surfaces, including clothing, furniture, and anywhere else our pets settle. So your pets can transfer the oil to you directly, as Sam …