What it is
The small intestine is where food is broken down and absorbed, and it normally holds far fewer bacteria than the large bowel. Its steady forward movement and the digestive juices keep their numbers in check. When that balance tips, the bacteria feed on what the dog was meant to absorb, damage the lining of the gut, and turn fats and sugars into irritating by-products and gas.
Overgrowth can follow anything that slows the gut or changes what is in it: a pancreas that makes too few digestive enzymes, inflammation of the bowel, a narrowing, or a problem with how the gut moves.
For you, it can mean extra trips outside, unsettled nights and a dog that stays thin however hungry it seems. Noting what the stools look like and when they come, and weighing your dog now and then, gives your vet a clear picture.
Signs you may notice
- Long-lasting or recurring diarrhoea
- Lots of wind
- Gurgling belly
- Stays thin despite eating well
- Occasional vomiting
- Eats grass or odd things
You may notice long-lasting or recurring diarrhoea, more wind and a gurgling belly, and the dog may lose weight despite eating well. Occasionally there is vomiting or an odd appetite.
When to see a vet
Book a visit if diarrhoea lasts more than a few days or keeps coming back, or if your dog loses weight while eating well. Bloody diarrhoea with weakness needs a vet without delay.
This is general information, not veterinary advice. For your own dog's health, tests and treatment, see a vet.