Tobacco Smoke, Vaping, Nicotine, and The Risk They Pose to Our Pets Green Acres Kennel Shop One of our customers has had first hand experience of this recently. One cigarette butt can contain enough nicotine to poison a dog. Especially puppies and smaller breeds. What can happen Vaping is making cats and dogs seriously ill warns vet and charity Discover SWNS Vaping isn't just harmful to humans it's dangerous for our pets too! The aerosols from e cigarettes contain toxic chemicals and nicotine that can seriously harm pets if inhaled or ingested.