Dog food types
Can raw feeding upset a dog's stomach at first?
Last updated 23 September 2026 · How we write and check this
Short answer
Yes, switching to raw food often causes loose stool, gas, or mild vomiting in the first few days as a dog's gut adjusts to a very different composition of fat, protein, and moisture than kibble, and this usually settles within 5 to 10 days of a gradual transition.
Why the gut reacts to raw
Kibble and raw food differ substantially in fat content, moisture, and how quickly they move through the digestive tract, so a dog's gut bacteria population needs time to shift toward digesting the new balance efficiently, similar to any major diet change.
How to ease the transition
Introduce raw gradually over 7 to 10 days, starting with roughly 25 percent raw mixed with 75 percent of the current food and shifting the ratio every couple of days, rather than switching entirely in one meal.
When the reaction is more than a normal adjustment
Occasional soft stool during transition is common, but repeated vomiting, stool with blood, or a dog that stops eating altogether during the switch needs a vet check rather than waiting it out.
Key takeaways
- A few days of loose stool or mild upset is common when starting raw food.
- A gradual 7 to 10 day transition, increasing the raw ratio in steps, reduces this.
- Repeated vomiting or bloody stool during the switch needs veterinary attention, not patience.