What's wrong with the dog's snot (the dog has too much snot)

1. Common causes of runny nose in dogs include upper respiratory tract infection caused by bacteria, virus infection, weather or environmental changes, such as colds and canine distemper.

2. Generally, upper respiratory tract infections will not have much impact on mental appetite, and nasal mucus is mostly serous or mucinous.

3. Canine distemper will affect mental appetite, leading to mental depression, anorexia, fever, yellow mucus with runny nose and many eye secretions.