Cats should not eat walnuts. Walnuts and other nuts contain potential toxins for cats, especially the inner membrane of the walnut. Eating walnuts can cause muscle pain, vomiting, and mental disturbances in cats. In addition, walnuts contain a lot of oil, and eating too many can easily cause indigestion and obesity in cats.

Furthermore, young cats are at high risk of choking on walnuts, as they can easily get stuck in their throat, esophagus, or digestive tract. In severe cases, this can even lead to suffocation. Therefore, owners must be careful not to feed walnuts to their cats.