Make switching food easy on your dogs tummy.
Switching your dog's food seems straightforward - out with the old, in with the new - but doing it too quickly almost always causes digestive upset. Loose stools, vomiting, and a gassy, uncomfortable dog are the typical result of a sudden food change. The good news is that a gradual transition takes only 7-10 days and makes the whole process smooth and stress-free for both you and your dog.
Why Switching Too Fast Causes Problems
A dog's digestive system relies on specific populations of gut bacteria to break down and absorb nutrients. When food changes suddenly, those bacteria populations haven't had time to adjust. The result is digestive disruption - loose stools, flatulence, vomiting, and sometimes loss of appetite. Switching gradually gives the gut microbiome time to adapt, and helps identify whether any reaction is due to the transition itself or a genuine sensitivity to an ingredient in the new food.
The Standard 7-10 Day Transition Plan
| Days | Old Food | New Food | Notes |
|---|---|---|---|
| Days 1-2 | 75% | 25% | Mostly old food. Watch for any initial reactions. |
| Days 3-4 | 50% | 50% | Equal mix. Stools may be slightly softer - this is normal. |
| Days 5-6 | 25% | 75% | Mostly new food. Most dogs are fully adjusted by now. |
| Days 7-10 | 0% | 100% | Full transition complete. Monitor for 2-3 more days. |
Step-by-Step Guide
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Buy both foods at the same time
Make sure you have enough of the old food to last the full transition period. Running out mid-transition and switching abruptly defeats the purpose.
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Weigh portions correctly
Work out the correct total daily amount based on your dog's weight and the new food's feeding guide. Measure by weight where possible. Adjust the old-to-new ratio within each meal rather than feeding old in the morning and new in the evening.
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Mix thoroughly
Mix both foods well so your dog can't pick out only their preferred food. This ensures they get the intended ratio at every meal.
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Monitor stools daily
Slightly softer stools for a day or two is normal. If stools become liquid, blood is present, vomiting occurs repeatedly, or your dog stops eating entirely, slow the transition down and consult your vet.
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Give it time before judging the new food
It takes 4-6 weeks for a dog's coat, digestion, and energy to fully reflect the benefits of a new food. Don't judge based on the first week alone.
Signs the Transition Is Going Well
- Normal or near-normal stools within a few days
- Good appetite at mealtimes
- Normal energy levels
- No vomiting
- No excessive scratching or skin changes
Signs to Slow Down or Stop
- Liquid or watery stools lasting more than 2 days
- Vomiting more than once
- Blood in stools or vomit
- Refusal to eat for more than 24 hours
- Lethargy or signs of abdominal discomfort
- Hives, excessive scratching, or facial swelling (possible allergic reaction)
Switching to a Higher Quality Food
Nadur Grain-Free - A Natural Upgrade
Nadur is Petstop's premium grain-free dry dog food, made with high-quality animal protein and natural ingredients. If you're switching from a lower-quality kibble to Nadur, allow 10-14 days for the transition given the higher meat content. Most dogs adjust well and their digestion, coat, and energy levels improve noticeably within 4-6 weeks.
Shop Nadur →WILD Fresh - Switching to Fresh-Cooked Food
Switching from conventional kibble to WILD Fresh is one of the bigger dietary changes you can make for your dog - from dry processed food to fresh-cooked food with much higher moisture content. Start with a small amount mixed into current food and build up over 14 days. Most owners see a significant improvement in digestion, coat condition, and overall vitality.
Shop WILD Fresh →Special Cases That Need Extra Care
Puppies
Puppies have more sensitive digestive systems. Transition over 10-14 days and watch carefully. If a puppy is showing loose stools, vomiting, or significant appetite loss, consult your vet.
Senior Dogs
Older dogs often have less digestive resilience. A very slow 14-day transition is recommended. If your senior dog has any existing health conditions, check with your vet before changing their diet.
Dogs with Sensitive Stomachs
Consider a food with a single protein source to make it easier to identify any reactions. Transition over 14-21 days. Adding a probiotic supplement during the transition can help support gut health - ask in-store for recommendations.
Frequently Asked Questions
My dog won't eat the new food - what should I do?
Add a small amount of warm water or a little wet food to improve palatability. Make sure you're not offering alternatives - if your dog knows refusing leads to something tastier, they'll hold out. A healthy dog will not starve themselves. If they haven't eaten for more than 48 hours, consult your vet.
Is it okay to switch food quickly in an emergency?
If you have no choice, feed a smaller meal of the new food rather than a full-sized one. Plain boiled chicken and rice can help buffer the transition. Get back to a proper gradual transition as soon as both foods are available.
How long before I see improvements after switching to a better food?
It typically takes 4-6 weeks to see the full benefits. Coat improvements are often noticed first, usually within 4-8 weeks. Digestive improvements can be faster, often within 2-3 weeks once the transition is complete.
My dog had loose stools during the transition - should I start over?
Not necessarily. Mild, brief digestive upset is normal. Pause the transition at the current ratio until stools normalise, then continue more slowly. Only go back to a higher proportion of old food if symptoms are severe. In most cases, pausing and slowing down is sufficient.
Looking for a Better Dog Food?
Browse Petstop's full range of premium dog food online or visit one of our 14 stores. Free delivery on orders over €29.
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