The reasons why cats have reddish-brown eye droppings:

1. The nasolacrimal duct is blocked due to dacryoadenitis, resulting in yellow-brown or reddish-brown secretions appearing in the corners or around the eyes.

2. A large amount of secretions caused by cat nasal congestion will accumulate in the corners of the eyes.

3. Trauma causes eye injury, which causes dark red, frozen or yellow secretions from the corners of the eyes.

4. Cats drink too little water and get angry, resulting in reddish-brown eye feces.

5. Due to different cat breeds, some cats have relatively flat faces and short nasal passages, so their eyes are prone to secretions flowing out, resulting in excessive and reddish-brown eye feces.