Why
Watermelon is about 92% water and adds vitamins A, B6 and C plus potassium, so it makes a light summer snack.
How to serve watermelon
- Cut the red flesh into cubes and remove every seed.
- Freeze cubes for a cooling treat.
Watch out for
- Seeds and rind can cause an intestinal blockage.
- The rind is also hard to digest and can upset the stomach.
How much watermelon can a dog eat?
Treats of every kind should stay under 10% of a dog's daily calories, says the World Small Animal Veterinary Association. Here is that daily treat budget by size, and how much watermelon it buys if watermelon is the only treat that day. Watermelon has about 30 kcal per 100 g; 1 cup, diced (152 g) is about 46 kcal.
| Dog size | Daily treat budget | Max watermelon a day |
|---|---|---|
| Small (10 lb) | 26 kcal | 87 g (half of cup, diced) |
| Medium (30 lb) | 59 kcal | 198 g (about one and a half cup, diced) |
| Large (60 lb) | 100 kcal | 334 g (about 2 cup, diced) |
| Giant (90 lb) | 136 kcal | 453 g (about 3 cup, diced) |
Less is better for small, overweight or diabetic dogs. Work out your own dog's numbers with the dog food calculator. Calories: USDA FoodData Central, Watermelon, raw.
Other fruit: quick answers
| Food | Verdict | Short answer |
|---|---|---|
| Avocado | Avoid | No. Avocado contains persin and is very high in fat. |
| Cherries | Avoid | No. Cherry pits, stems and leaves contain cyanide. |
| Bananas | Small amounts | Yes, as an occasional treat. Bananas are low in calories but high in sugar. |
| Cantaloupe | Small amounts | Yes, in moderation. It is low in calories but high in sugar. |
| Coconut | Small amounts | Yes, in small amounts. Keep the hairy husk away. |
| Cranberries | Small amounts | Yes, a few plain cranberries. Too many can upset the stomach. |
| Mango | Small amounts | Yes, peeled flesh in small amounts. Remove the hard pit. |
| Oranges | Small amounts | Yes, a segment or two of the flesh, without peel or seeds. |
Rules for any new food
- Plain is the rule: no salt, butter, oil, onion, garlic, sugar or sweeteners. Most of the danger in human food comes from what is added to it.
- Keep all treats under 10% of your dog's daily calories (WSAVA). The rest should come from a complete dog food.
- Check labels for xylitol, raisins, chocolate and macadamia nuts, which turn up in baked goods, snacks and spreads.
- If your dog has a health condition, such as diabetes, pancreatitis or kidney disease, ask your vet before adding any new food.
Frequently asked questions
Is watermelon safe for dogs?
Yes. Seedless flesh with the rind removed is a safe, hydrating treat.
How much watermelon can a dog eat?
Treats of any kind should stay under 10% of a dog's daily calories (WSAVA). For a 30 lb dog that is about 59 kcal a day, or roughly 198 g of watermelon if it is the only treat that day.
Sources
- American Kennel Club, "Fruits and Vegetables Dogs Can and Can't Eat" (updated Aug 4, 2026)
- WSAVA Global Nutrition Committee, "Feeding treats to your dog"
- USDA FoodData Central, SR Legacy (April 2018 release)
Checked October 17, 2026. We are a reference, not a vet: if in doubt, call yours. How we check.