There are many reasons why Teddy sheds tears: 1. It may be caused by too much salt in the diet and the diet needs to be adjusted; 2. The dog's eyelashes are too long, causing eyelash trichiasis and irritating the eyes to shed tears; 3. Hereditary Tears, caused by blocked lacrimal glands in dogs. Severe cases mentioned above will cause tear stains on the dog's face, and owners should deal with them in time.