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 Is Second Hand Smoke Bad For Dogs? Frontiers Dog and cat exposures to drugs of abuse identified by the California animal health and food safety laboratory system 20132023 Cannabis (Marijuana) Intoxication in Cats and Dogs River Landings Animal Clinic in Bradenton, Florida