How to Transition Your Dog to a New Food Without an Upset Stomach

Introduction

You've found a better food for your dog - great. But if you switch too quickly, even the highest quality food can cause vomiting, loose stools or a very unhappy dog.

The good news is that transitioning dog food is simple if you do it gradually. Here's exactly how to do it.

Why You Can't Just Switch Straight Away

Your dog's gut is home to trillions of bacteria that help digest food and they're finely tuned to whatever your dog is currently eating. Introduce a completely different food overnight and you're effectively pulling the rug out from under the whole digestive system. The result is usually diarrhoea, vomiting or excessive wind.

A gradual transition gives the gut microbiome time to adjust, new digestive enzymes time to develop, and your dog time to get used to the new taste and texture.

The 7-Day Transition Plan

Day	Old Food	New Food
1–2	75%	25%
3–4	50%	50%
5–6	25%	75%
7+	0%	100%

Mix the foods together thoroughly in the bowl rather than serving them side by side, this helps your dog accept the new food without picking around it.

Should You Go Slower?

Yes, in some cases. If your dog has a known sensitive stomach, digestive issues, or has reacted badly to food changes in the past, extend the transition to 10–14 days by slowing down each stage.

Signs you need to slow down:

• Loose stools or diarrhoea

• Vomiting after meals

• Reduced appetite or refusing food

• Excessive wind or bloating

If any of these appear, drop back to the previous ratio for a few days before progressing again.

Tips to Make the Transition Easier

• Don't mix wet and dry if switching types - it can make it harder to identify the cause if symptoms arise

• Keep treats consistent during the transition - switching food and treats at the same time makes it impossible to pinpoint problems

• Feed at regular times - consistency supports digestive rhythm

• Add a probiotic - a short course of dog-specific probiotic powder during the transition can help support gut bacteria. Our Dog Food Toppers are also great for encouraging fussy eaters to accept the new food

• Weigh portions - changing food often means changing feeding amounts; check the feeding guide on the new food's packaging

  
  

What if My Dog Refuses the New Food?

Some dogs are creatures of habit and resist change. A few tricks that help:

• Warm the food slightly with a small amount of warm water - this releases the aroma and makes it more appealing

• Add a small amount of a food topper to encourage interest

• Try hand feeding a small amount of the new food first so your dog associates it with something positive

• Be patient - most dogs come around within a few days

After the Transition

Once your dog is fully on the new food, give it 4–6 weeks before assessing whether it's working. Coat condition, energy levels, stool quality and general demeanour are all good indicators. Most owners who switch to a higher quality, hypoallergenic food notice improvements in coat shine and digestion within the first few weeks.

If you've switched to one of our foods and have any questions along the way, we're always here to help - get in touch any time.