Updated 11 April 2026
How to Transition Your Dog to New Food Safely (10-Day Plan)
Sudden food changes are one of the most common causes of digestive upset in dogs. A gradual transition gives the gut bacteria time to adapt. Here are the standard 10-day and extended 21-day schedules, plus a fecal scoring guide to know when to pause or proceed.
Standard 10-Day Transition Schedule
Suitable for most dogs. If your dog has a history of reacting to food changes, use the extended 21-day schedule below instead.
| Days | Old Food | New Food | Notes |
|---|---|---|---|
| Days 1 to 2 | 75% | 25% | Start slow. Monitor appetite and stool quality. |
| Days 3 to 4 | 50% | 50% | Half and half. If stools soften, hold at previous ratio for 2 more days. |
| Days 5 to 6 | 25% | 75% | Almost there. Most digestive adjustment happens by this point. |
| Days 7 to 8 | 10% | 90% | Minimal old food as a final bridge. |
| Days 9 to 10 | 0% | 100% | Full transition. Stools should be forming normally. |
Extended 21-Day Schedule for Sensitive Dogs
For dogs with a known sensitive stomach, IBD, or a history of reacting to food transitions. Slower ratio changes with longer stabilisation periods at each step.
| Days | Old Food | New Food | Notes |
|---|---|---|---|
| Days 1 to 3 | 90% | 10% | Very small amount of new food mixed in. |
| Days 4 to 6 | 80% | 20% | Slight increase. Watch for any reaction. |
| Days 7 to 9 | 70% | 30% | Gradual. Pause here if stools soften. |
| Days 10 to 12 | 60% | 40% | Past the initial adjustment for most dogs. |
| Days 13 to 15 | 50% | 50% | Halfway point. Stools should be stabilising. |
| Days 16 to 17 | 35% | 65% | Approaching full transition. |
| Days 18 to 19 | 20% | 80% | Minor bridge of old food remaining. |
| Days 20 to 21 | 0% | 100% | Complete. Allow 2 more weeks for full adaptation. |
Fecal Scoring Guide (1 to 7 Scale)
The standard veterinary fecal scoring system. Use this during any food transition to know when to proceed, pause, or go back.
Very hard, dry pellets. No residue when picked up.
Constipated. Increase moisture in diet or add wet food.
Firm, segmented. Leaves minimal residue.
Ideal. Healthy, well-formed stool. Continue current approach.
Log-shaped, moist. Leaves slight residue.
Acceptable. Normal for many dogs during transition.
Soft, log-shaped but loses form if picked up.
Mild concern. Hold transition at current ratio for 2 days.
Very soft, pile-shaped. Difficult to pick up.
Pause transition. Return to previous ratio. Wait for score 2 to 3 before proceeding.
No defined shape, pudding-like texture.
Diarrhoea. Return to higher old-food ratio. Consider bland diet for 1 to 2 days.
Liquid, no solid form. May contain mucus.
Stop transition. Bland diet for 2 to 3 days. If persists, see vet.
Tips for Difficult Transitions
Warm the Food
Slightly warming food (5 to 10 seconds in microwave) increases aroma and palatability. Stir well to distribute heat. Never serve hot.
Add Bone Broth
A tablespoon of plain, unsalted bone broth (no onion or garlic) makes new food more appealing while adding moisture and nutrients.
Split Meals
4 smaller meals instead of 2 larger ones reduces the volume per meal, giving the stomach less to process at once.
Use Food Puzzles
Slow feeder bowls and food puzzles reduce eating speed. Particularly helpful for dogs that gulp food and then vomit.
What to Do If the New Food Does Not Work
Give any new food at least 3 to 4 weeks of consistent feeding before deciding it does not work. The gut microbiome needs time to adapt, and initial loose stools during transition do not necessarily mean the food is wrong for your dog.
If after 4 weeks of consistent feeding your dog still has symptoms, try a food with a different primary protein source. If your dog reacted to a salmon-based food, try turkey or lamb. If multiple protein sources cause reactions, move to a limited ingredient diet for a formal elimination approach.