Swollen Tonsills In Dogs. Tonsillitis typically occurs when a secondary disease affects the oral cavity of dogs. One of the more common ways dogs can get tonsillitis is from a buildup of tartar on the teeth due to poor dental hygiene, or a gum infection.
Swollen, red tonsils will bulge out of their crypts and can be easily seen in the back of the throat. Dog suffering from tonsillitis usually experience loss in appetite due to pain and frequently, swollen tonsils results to extreme fatigue. Eating can be painful due to a sore throat, so the dog may be disinterested in food and begin to lose weight.