Start with the vet
When a dog who has been reliably housetrained starts pooping indoors, it is often a sign that something has changed rather than “bad behavior.” Because health problems are a common cause, a vet visit is a sensible first step, especially if the change is sudden, the stool looks abnormal or the dog seems unwell.
This article offers general information only and cannot diagnose your dog.
Medical causes
Several health issues can cause urgency or loss of bowel control, including:
- intestinal parasites
- infections or inflammation of the gut, such as colitis
- food intolerance or a sudden diet change
- other digestive conditions that your vet can investigate
Contact your vet promptly if you see blood or mucus, black stool, vomiting, lethargy, a loss of appetite, straining, or diarrhea that does not settle. Do not give human medications unless your vet tells you to.
Age-related changes
Older dogs may have trouble getting outside in time because of arthritis or other pain, or because of cognitive changes that make them confused about routines. Weakness or conditions affecting the muscles and nerves can also play a part. If your senior dog is having accidents or seems to have bowel incontinence, a vet check is important, as there may be treatable causes or ways to make life easier.
Stress and anxiety
Stress can upset a dog’s stomach and routine. Possible triggers include:
- separation anxiety
- a move, new baby or new pet
- loud noises, storms or fireworks
- a change in work hours or household schedule
- fear of the outdoor area itself
If the accidents happen mainly when you are away, anxiety may be involved. Speak to your vet or a qualified behaviorist, and see ways to calm a dog for general settling strategies. Our guide to helping a rescue dog adjust to a new home also covers stress signs and settling routines that apply to many dogs.
Routine, diet and environment
Dogs thrive on predictability. Check whether anything has changed:
- feeding times or food type
- fewer or shorter outings
- a new walking route or a closed-off potty spot
- bad weather making your dog reluctant to go outside
- a new household member or visitors
Even small changes can disrupt a dog’s schedule. Keep any food change gradual and check with your vet if stools stay loose.
What to note before the vet visit
Jot down:
- your dog’s age and breed
- when the accidents started and how often
- what the stool looks like and how often your dog goes
- any changes in food, treats, routine or stress
- other symptoms such as vomiting, appetite changes, thirst or lethargy
- a stool sample if your vet requests it
Cleaning up
Use an enzymatic cleaner made for pet messes. Ordinary cleaners may leave odor your dog can still detect, which can encourage repeat accidents in the same place.
Resetting the routine
Once health issues are addressed or ruled out:
- Feed at consistent times.
- Offer outdoor trips first thing in the morning, after meals, after naps and before bed.
- Take the dog to the same spot and reward right after they go.
- Supervise indoors, or limit access to certain rooms for a while.
- Make the outdoor area comfortable, especially in poor weather.
The same principles are explained for young dogs in puppy house training regression.
What not to do
- Do not punish or scold, or rub the dog’s nose in it. Punishment can create fear and may make accidents worse.
- Do not assume it is spite.
- Do not ignore a pattern, since repeated accidents are worth investigating.
Older dogs and incontinence
If a senior dog loses bowel control, talk to your vet about the possible causes and management options. They may suggest more frequent outings, easier access to the potty area, or tests to find an underlying condition. Patience and gentle management matter a lot, as the dog is generally not doing it on purpose.