Is Vaping Dangerous for Pets? Veterinarian Demo 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 Little Bear would like you to know the DANGERS OF VAPING AROUND YOUR PETS! Experts have warned the vapor could cause health problems like heart disease, respiratory issues and even cancer. A Is it risky to smoke or vape around companion animals? RSPCA Knowledgebase