Sugar-free gum is very toxic to dogs. Common signs of toxicity include lethargy and pets not acting like themselves. If you suspect that your dog has eaten gum, bring them to your veterinarian immediately. Video of dgfPFo3nF30 Related Articles Pulmonary Thromboembolism (PTE) in Dogs and Cats Legg-Calve-Perthes Disease in Dogs Why Do Dogs Wag Their Tails? Helping Your Dog through Grief and Depression