Many dogs get loose stools when switching foods too quickly. This simple plan helps your dog adjust gradually while you monitor results.
Quick takeaways
- Slow transitions reduce stomach upset and diarrhea.
- Change one thing at a time (new food, new treats, new chews).
- If symptoms are severe or persistent, talk to your vet.
Why dogs get diarrhea during food changes
Sudden diet changes can disrupt digestion. Some dogs are also sensitive to certain proteins, fats, or ingredients. A gradual transition gives the gut time to adapt.
7-day dog food transition schedule
- Days 1–2: 75% old food + 25% new food
- Days 3–4: 50% old food + 50% new food
- Days 5–6: 25% old food + 75% new food
- Day 7: 100% new food
If your dog has a very sensitive stomach (use 10–14 days)
If stools soften, slow the schedule. Stay at the current mix for 2–3 days before increasing the new portion.
What to do if stools get soft
- Stop increasing the new food percentage.
- Return to the last ratio that produced normal stool.
- Pause new treats and chews until stools normalize.
- Ensure fresh water is available.
- If diarrhea is severe or lasts more than 24–48 hours, contact your vet.
Tips to make transitions easier
- Measure portions consistently.
- Feed on a schedule (avoid all-day free feeding during transition).
- Choose a single protein if your dog has known sensitivities.
- Keep training treats small and limited during the switch.
When to call a vet
- Blood in stool
- Vomiting repeatedly
- Lethargy or refusing food
- Diarrhea in a very young puppy
- Signs of dehydration (dry gums, weakness)
FAQ
Can I switch dog food in 3 days?
Some dogs tolerate quick switches, but sensitive dogs often do better with 7–14 days.
Should I add probiotics during a food transition?
Some dogs benefit, but introduce only one new thing at a time and follow product guidance.
Do I need to change treats too?
During a transition, keep treats minimal and consistent so you can identify what affects digestion.
Next step
Tell us your dog’s age, current food, and the reason for switching. We can help you choose a gentle option and plan.
