Watermelon
Dogs and cats can eat watermelon in moderation. Watermelon contains a high water content and is rich in dietary fiber, which can aid digestion. It also provides vitamin C and beta-carotene, which support a healthy immune system.

Vitamin C
Vitamin C is an essential nutrient for building a strong immune system. Dogs and cats cannot produce enough vitamin C naturally, so they must obtain it from external sources.
Vitamin C acts as an antioxidant, helping protect cells from damage caused by free radicals. It also supports the growth and maintenance of bones and joints and is involved in collagen production.
Beta-Carotene
Beta-carotene helps maintain eye health in dogs and cats. Inside the body, beta-carotene is converted into vitamin A, which is essential for healthy vision.
It also functions as an antioxidant, reducing free radicals and strengthening the immune system. However, excessive consumption of watermelon may lead to digestive issues, so it’s best to offer it in moderate amounts.
Precautions When Feeding Watermelon
Seeds and Rind
Watermelon seeds can cause digestive issues and may even lead to intestinal blockages if swallowed in large amounts. The rind is also difficult to digest and may irritate the gastrointestinal tract. Always remove the seeds and rind before offering watermelon, and feed only in small portions.
Diabetes
Watermelon contains natural sugars, so it should not be given to dogs or cats with diabetes. Avoid feeding watermelon to pets with high blood sugar or related conditions.
Serving Size
Even if your pet enjoys watermelon, too much can cause digestive problems. A sensible portion is about 1–2 small cubes (roughly two thumb-sized pieces) once a day as an occasional treat.
Summary
Watermelon can be a healthy and refreshing treat for dogs and cats when served in moderation. It’s rich in water, fiber, vitamin C, and beta-carotene, which support digestion, immune function, and eye health. However, always remove the seeds and rind, avoid giving it to pets with diabetes, and limit the portion size to prevent digestive upset.