Dog food types
Can mixing food cause my dog to gain weight?
Last updated 23 September 2026 · How we write and check this
Short answer
Yes, mixing wet and dry food can lead to weight gain if you serve a full portion of each rather than calculating combined calories, since this effectively doubles up on calories beyond what your dog actually needs in a day, a common and easy mistake to make without realizing it.
How the overfeeding typically happens
An owner following the recommended daily amount printed on the dry food bag, then also adding a full can of wet food on top rather than as a partial substitute, can easily end up feeding well beyond the dog's actual daily calorie requirement.
The correct way to combine without overfeeding
Calculate the calories contributed by both the wet and dry portions and ensure their combined total matches, not exceeds, the target daily calorie amount for your dog's weight and activity level, treating the two formats as parts of one meal rather than two separate full servings.
Monitoring to catch it early
Regularly checking your dog's body condition by feeling for ribs under a light layer of fat and tracking weight every few weeks helps catch gradual weight gain from an unbalanced mixed diet before it becomes significant.
Key takeaways
- Serving full portions of both wet and dry food, rather than combined calories, is a common cause of weight gain.
- Treat mixed feeding as one calculated meal rather than two separate full servings.
- Regular body condition checks help catch gradual weight gain early.