Excessive eye discharge in cats may be due to dietary issues, such as eating too much salt or not drinking enough water, which can cause internal heat and thus increase eye discharge. It can also be caused by diseases such as dacryocystitis and feline rhinotracheitis.

In addition, excessive eye discharge in cats may be caused by bacterial or viral infections, such as conjunctivitis or keratitis, leading to increased eye discharge. If you observe a persistent increase in the amount of eye discharge or abnormal color or texture in your cat, it is recommended to take your cat to a veterinary hospital for a thorough examination as soon as possible.