Dog food types
What is the 25 50 75 100 method for changing dog food?
Last updated 23 September 2026 · How we write and check this
Short answer
The 25/50/75/100 method is a common gradual food transition schedule where you feed 25 percent new food mixed with 75 percent old food for a couple of days, then move to a 50/50 mix, then 75 percent new to 25 percent old, before reaching 100 percent new food by around day 7 to 10.
How the stages typically break down
A common version spends days 1 to 2 or 3 at the 25 percent new ratio, days 3 to 5 at 50/50, days 5 to 7 at 75 percent new, and days 7 to 10 fully on the new food, though the exact days can flex based on how your dog's stool responds at each stage.
Why this specific structure works well
Moving in even quarter increments gives the gut bacteria population several small, manageable adjustments rather than one large shift, which research on digestive adaptation supports as generally gentler than an abrupt change.
Adapting the method to your dog
A dog with a sensitive stomach history can stretch each stage to 3 to 4 days instead of 2, effectively extending the whole method to 12 to 16 days, while a resilient dog with no history of digestive issues might compress it slightly.
Key takeaways
- The 25/50/75/100 method moves through quarter increments of new food over roughly 7 to 10 days.
- Each stage typically lasts 2 to 3 days but can be adjusted based on how the dog responds.
- Sensitive dogs can stretch the method longer by extending each stage a few extra days.