The short answer: eating poop on walks is common, and for most dogs it is a scavenging habit rather than a sign of illness. Dogs are natural scavengers with a powerful sense of smell, and a walk is full of things to find. It is unpleasant to watch, but on its own it is rarely an emergency.
It is worth a closer look when the habit starts suddenly in an adult dog, comes with other changes like weight loss or a bigger appetite, or will not settle despite training. Those patterns can point to a health cause rather than a behavioural one.
The everyday reasons
Scavenging instinct. Dogs explore the world with their nose and mouth. Faeces from other animals — foxes, rabbits, other dogs, livestock — carries strong smells, and some dogs treat it as food. This is the most common reason for poop eating on walks.
Puppy exploration. Young dogs mouth and taste almost everything as they learn. Many puppies grow out of it, especially with steady training.
Boredom or under-stimulation. A dog that is not getting enough to sniff, do, and think about may fill the gap by scavenging. A walk that lets the dog sniff and explore often reduces the urge.
Learned attention. If a dog has learned that grabbing poop makes a person rush over, react, and chase, the reaction itself can become the reward.
When it points to something more
If an adult dog suddenly starts eating poop, or does it far more than before, a few causes are worth knowing:
- A diet that is not meeting their needs. A dog missing nutrients, or not absorbing them well, may seek them elsewhere. A vet can check whether the food fits the dog.
- Conditions that increase appetite. Diabetes, Cushing’s disease, an overactive appetite from some medications, or a poorly working thyroid can all drive a bigger, less selective appetite.
- Digestive problems. Conditions that stop a dog absorbing food properly, such as pancreatic issues, can leave a dog hungry and scavenging.
- Parasites. A heavy worm burden can pull nutrients from the dog and change its appetite.
None of these can be diagnosed at home. A sudden change is the signal to book a vet check rather than wait it out.
What you can do
Start with management, because it works while training catches up.
- Watch the ground. Scan ahead on walks and steer around droppings before your dog reaches them.
- Keep the lead on in high-risk spots. Fields with livestock, wildlife, or lots of dog traffic are the usual hotspots.
- Teach a solid “leave it” and “come.” Reward heavily when your dog turns away from something on the ground. These two cues do most of the real work.
- Stay calm. Chasing and shouting can turn poop-grabbing into an exciting game. Redirect to a treat instead.
- Make the walk richer. Let your dog sniff and explore. A dog that is mentally busy scavenges less. Some dogs who eat poop are also the ones who eat grass on walks — both are scavenging habits, handled the same calm way.
When to call the vet
- The habit starts suddenly in an adult dog.
- It comes with weight loss, a bigger appetite, drinking more, or an upset stomach.
- Your dog seems unwell, low, or off its food in other ways.
- The behaviour is constant and training makes no dent over several weeks.
Eating another animal’s faeces can also pass on worms and other bugs, so keep your dog’s worming up to date and mention the habit to your vet at the next visit.
Matching the walk to the dog
A walk with enough sniffing and exploring gives a scavenging dog a better outlet than snatching things off the ground. The walk-length calculator helps set a baseline that fits your dog’s age, breed, and fitness.
Food-motivated breeds notice this more than most. Labrador Retrievers, famous for eating almost anything, often need extra “leave it” practice and a well-matched, sniffy walk to take the edge off.
For the research behind our health and exercise advice, see our sources.