Vets warn of dangers of vaping and smoking around pets News from Scotland Secondhand smoke and aerosol If you use nicotine, so does your pet! Way to Quit 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 Everyone knows that secondhand smoke is harmful to humans, but did you know it can be equally detrimental to your pets?