Assess the xylitol (birch sugar) poisoning risk for your dog
Xylitol (birch sugar) is extremely toxic for dogs. As little as 0.1 g per kg body weight can trigger life-threatening hypoglycemia. Above 0.5 g/kg, acute liver failure is possible. A single piece of sugar-free gum can be lethal for small dogs.
Xylitol is found in sugar-free gum, candies, toothpaste, baked goods, peanut butter (some US brands), supplements, and diabetic products. Concentrations vary widely: gum contains 0.3-1.5 g per piece, toothpaste up to 30%.
Go to the vet immediately. Symptoms (weakness, vomiting, staggering, seizures) can appear within 15-30 minutes. Blood sugar drops extremely fast. Do not induce vomiting yourself. The vet will administer glucose infusions and monitor liver values for 72 hours.