7-Day Food Transition
Switch kibble gradually over seven days: a quarter more new food every two days. With soft stools: extend to 10 to 14 days.
What is it?
The 7-day transition plan is a fixed way to move from one kibble brand or recipe to another. You mix old and new food in the same bowl, every two days you shift the ratio by a quarter towards the new food.
Why does it matter?
Your dog or cat's gut flora is adapted to the current food. An abrupt switch leads to undigested food and often soft stools or diarrhoea. Gradual transition gives gut bacteria time to adjust to new proteins, fibres and fats.
How does it work?
Days 1-2: 75% old, 25% new. Days 3-4: 50/50. Days 5-6: 25% old, 75% new. Day 7: 100% new. Split the daily portion across two meals. If your pet develops soft stools, step back one stage and extend each phase by two to three extra days, up to 10 to 14 days total.
Benefits
- Lower chance of diarrhoea when switching food
- Simple step plan (quarter per phase)
- Adjustable for sensitive guts (10-14 days)
Misconceptions
Mixing in one bowl is the method this plan uses, so every meal has the same old-to-new ratio. Whether feeding separately (old in the morning, new in the evening) works worse has not been studied. The same principle applies to cats, even if some prefer separate portions.
FAQs
Sources
- Liao P., Yang K., Huang H., et al. (2023). Abrupt Dietary Change and Gradual Dietary Transition Impact Diarrheal Symptoms, Fecal Fermentation Characteristics, Microbiota, and Metabolic Profile in Healthy Puppies. Animals 13(8):1300; doi:10.3390/ani13081300 (PMID 37106863; PMC10135323)
- Maturana M., Castillejos L., Lesaux A.A., Martin-Orue S.M. (2025). Impact of an abrupt change from dry to canned diet on digestive function and gut microbiota in dogs. Journal of Animal Science 103:skaf143; doi:10.1093/jas/skaf143 (PMID 40405061; PMC12391870)
- Lin C.-Y., Jha A.R., Oba P.M., Yotis S.M., Shmalberg J., et al. (2022). Longitudinal fecal microbiome and metabolite data demonstrate rapid shifts and subsequent stabilization after an abrupt dietary change in healthy adult dogs. Animal Microbiome 4(1):46; doi:10.1186/s42523-022-00194-9 (PMID 35915514; PMC9341101)
- Pilla R., Suchodolski J.S. (2021). The Gut Microbiome of Dogs and Cats, and the Influence of Diet. Veterinary Clinics of North America: Small Animal Practice 51(3):605-621; doi:10.1016/j.cvsm.2021.01.002 (PMID 33653538)