Puppy feeding and growth
Can I mix puppy food and adult food during the transition?
Last updated 23 September 2026 · How we write and check this
Short answer
Yes, mixing puppy and adult food together is exactly how a safe transition works, gradually increasing the proportion of adult food over 7 to 10 days. Short term mixing during this window is not a nutritional problem, since the puppy is still getting adequate nutrients from the puppy food portion throughout.
Mixing is the method, not a shortcut
Rather than viewing mixed meals as a compromise, they are the standard way to change a dog's diet safely. The gradual ratio shift lets gut bacteria adjust in step with the changing food, which is why vets and breeders recommend it over a same day switch.
How long mixing should last
A week to ten days of mixing is typically enough for most dogs. Extending it longer than two weeks is unnecessary in most cases and can make it harder to tell whether any digestive symptoms are coming from the new food or the old one.
Mixing two different brands
It is fine to mix a puppy food from one brand with an adult food from another during the transition, as long as both are appropriate for the dog's current life stage and size category. There is no requirement to stay within the same product line.
Key takeaways
- Mixing puppy and adult food together is the recommended method for switching diets.
- A 7 to 10 day mixing period suits most dogs.
- Extending the mix much beyond two weeks offers little added benefit.
- The two foods being mixed do not need to be from the same brand.