Dog Food Transition Calculator: Switch Your Dog's Food Safely
Switching foods too fast upsets a dog's stomach. Pick a start date below and we'll lay out the day-by-day plan to mix old and new food — the AKC's gradual schedule, with every step linked to its source.
| Day | New food | Old food |
|---|---|---|
| Days 1–2 | 25% new | 75% old |
| Days 3–4 | 50% new | 50% old |
| Days 5–6 | 75% new | 25% old |
| Day 7 | 100% new | — |
Switch over about a week (day 1 to day 7), holding each ratio until the next step. The total daily amount stays the same — you're only shifting the new/old split. Cups and grams assume a typical healthy dog.
How to switch safely
- Go gradual. A sudden change can cause stomach upset and diarrhea, so mix in the new food over about a week.
- Watch your dog.Keep an eye on appetite and stool. If your dog gets loose stools or won't eat, stay on the current ratio an extra day or two before moving on.
- Sensitive stomach? Go slower and stretch the steps out — and ask your veterinarian if your dog has ongoing digestive issues.
Common questions
- How long should switching dog food take?
- The AKC recommends a gradual switch over about a week: day 1 is 25% new food and 75% old, day 3 is 50/50, day 5 is 75% new, and by day 7 it's 100% new. Use the start-date field above to put real dates on each step.
- What are the daily old/new ratios?
- Day 1: 25% new and 75% old. Day 3: 50% new and 50% old. Day 5: 75% new and 25% old. Day 7: 100% new. Hold each ratio until the next step.
- Do I feed more during the transition?
- No — the total daily amount stays the same. You're only changing the proportion of new to old food, not adding extra. Use the dog food calculator for your dog's total daily amount.
- What if my dog gets diarrhea or won't eat during the switch?
- A sudden change can upset a dog's stomach, so slow down: stay on the current ratio for an extra day or two before moving on. If loose stools or refusal continue, check with your veterinarian.
- My dog has a sensitive stomach — should I go slower?
- Yes. Dogs with sensitive stomachs or digestive issues often do better with a longer, slower transition — stretch the steps out and ask your veterinarian for guidance.