Cats can eat watermelon. Watermelon is rich in water and vitamins, and feeding it to cats in moderation can help them stay hydrated. However, the sweetness and sugar content of watermelon may be harmful to cats, especially those with diabetes.
Watermelon seeds are also harmful to cats because they cannot digest them, which may cause gastrointestinal upset or blockage. Cats are primarily carnivores, and their digestive systems are better suited to digesting high-protein foods rather than high-sugar fruits.
This can lead to picky eating in cats in the long run and can also cause malnutrition. It is recommended that cat owners feed their cats mainly cat food and can feed them some cooked meat and small treats in moderation.
