The reasons why Golden Retrievers have eye mucus:

1. It may be viral infection, such as canine distemper virus, and the Golden Retriever’s eye discharge will increase.

2. It may be that the Golden Retriever’s nasolacrimal duct is blocked. The nasolacrimal duct is blocked and eye secretions can only flow out through the corners of the eyes and accumulate into eye feces.

3. It may be golden retriever eye inflammation, such as conjunctivitis, blepharitis, eyelid entropion, etc., causing eye inflammation, excessive tears, and excessive eye feces.

4. It may be that eating high-sugar and high-salt foods or a large amount of animal offal causes an increase in golden retriever tears and the formation of eye feces.

5. It is also possible that the golden retriever has trichiasis or foreign matter in the eyes, causing the eyes to shed too many tears and form eye feces.