Nutrition·8 March 2026·4 min read
Switching Pet Food Without GI Upset
Sudden food changes cause vomiting and diarrhoea. Here is the 7-day transition that prevents it.
The 7-day transition\n\n| Day | Old food | New food |\n| --- | --- | --- |\n| 1–2 | 75% | 25% |\n| 3–4 | 50% | 50% |\n| 5–6 | 25% | 75% |\n| 7+ | 0% | 100% |\n\n## Slow it down for sensitive pets\n\nIf your pet has a history of GI sensitivity, stretch this to 10–14 days. Cats often need slower than dogs.\n\n## What to watch for\n\nSoft stools, occasional loose stool — usually self-limited; back up one step for two days. Vomiting, persistent diarrhoea, refusal to eat — pause transition and call us.\n\n## When to switch\n\n- Life stage change (puppy → adult, adult → senior)\n- Allergy or skin issue (under vet guidance)\n- Stool quality/coat condition not great on current food\n\n## When NOT to switch\n\n- Pet just had surgery or illness — wait until recovered\n- Right before a stressful event (boarding, travel)\n- "Just to try" — only switch with a reason\n\n## Pro tip\n\nAlways introduce a new food when you have at least 7 days at home to monitor.
Frequently asked
Slow the transition further. Mix in a tablespoon of warm water or low-sodium broth to increase aroma.
Risky — diarrhoea likely. Always do a transition unless we tell you otherwise.
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