Teddy can't eat watermelon seeds. Watermelon seed shells are hard and difficult to digest, which may irritate the dog's gastrointestinal tract. Eating too much may cause indigestion in dogs. Moreover, watermelon seeds contain cyanide, which accumulates to a certain amount in the body and can damage internal organs and lead to vital organ failure.

Care methods for Teddy who accidentally eats watermelon seeds:

1. Induce vomiting. Take a small spoonful of salt water and feed it to the dog. Drinking the salt water will cause a gastrointestinal reaction and cause the dog to vomit foreign objects.

2. Feed probiotics. The owner can give some probiotics and closely observe the dog's overall condition.

3. Surgical treatment. If your dog accidentally eats watermelon seeds and develops adverse symptoms, he or she needs to seek medical attention as soon as possible to induce vomiting. In severe cases, surgery may be required.