Blood in my puppy's poo — what to do

Ring your vet — what to tell them

Call your practice and describe what you have seen: roughly how much blood, whether it looks bright red or dark, whether your puppy is otherwise bright, eating and drinking normally, and whether there has been any vomiting alongside it. Mention your puppy's vaccination status too, since this affects how urgently they will want to see them.

Also mention anything unusual your puppy might have eaten recently, when they were last wormed, and whether their diet has changed in the last few days. All of this genuinely speeds up how quickly your vet can work out what is going on once you arrive.

What blood in poo can mean

Worms, a sudden change of diet, or a puppy who has stolen and eaten something they should not have are all common, usually manageable causes of blood appearing in a puppy's stool. These are the most frequent explanations and are often far less serious than owners initially fear.

Less commonly, it can be a sign of something more serious, including infection, and — particularly in a young or incompletely vaccinated puppy — parvovirus, which is exactly why vaccination status is one of the first things a vet will ask about. None of this means your puppy definitely has any specific condition; it means the range of possibilities is wide enough that a vet needs to see them rather than you guessing from home.

Bright red blood versus dark, tarry poo

Bright red blood, often on the surface of otherwise normal-looking poo, usually points to the lower part of the gut or the rectum, and is commonly linked to fairly minor, treatable causes. Dark, tarry-looking poo can suggest bleeding further up the digestive system and is generally treated as more urgent by vets.

This distinction is genuinely useful information to describe accurately on the phone, since it helps your vet judge how quickly they need to see your puppy — but it is a detail to report, not a diagnosis to make yourself.

Mucus mixed in with the stool, straining to go, or your puppy going more often than usual are all worth mentioning too, since they add to the overall picture your vet is building before you even arrive. None of these details tell you what is wrong on their own, but together they help your vet triage the call accurately.

While you wait for the appointment

Keep your puppy quiet and comfortable, with fresh water always available — do not withhold water even if you are worried about further stools, since a puppy who is unwell needs to stay hydrated. Avoid giving any human medication of any kind.

If you can, keep a sample or a clear photo of what you saw to show your vet, and note the time it happened. Puppy pads and a good cleaning product make managing accidents around the house considerably easier while you get everything sorted, without needing to guess at what is wrong yourself.

If your own practice is closed, their answerphone message will normally direct you to the right out-of-hours number for your area, and our directory of local vets also lists practices with emergency and out-of-hours cover if you need to find one.

What can help

Things we stock that owners commonly use alongside a vet’s advice — not a substitute for it.

Reusable Washable Puppy Training Pad

A quilted, machine-washable training pad that absorbs accidents and locks in moisture with a leak-resistant base. Reusable for puppy toilet training and senior dogs, in several bone and paw prints.

From£7.99

Fast UK delivery

ANIGENE Pet Urine Eliminator 750ml – Citrus Fragrance

Breaks down urine crystals at the source rather than masking the smell — helps fully eliminate odours and reduce repeat marking behaviour.

£12.99

Fast UK delivery

PowAir Odour Neutralising Gel Jar 400g — Pet Safe, Natural Formula

An open-jar odour neutraliser made from essential oils that quietly gets rid of pet smells for up to 60 days — no sprays, no fuss.

£12.99

Common questions

Is blood in a puppy's poo always an emergency?

It is always worth a same-day call to your vet, even if it turns out to be something relatively minor like worms or a diet change. Puppies can decline quickly, so getting it checked properly is safer than waiting to see if it resolves on its own.

What does bright red blood in poo usually mean?

Bright red blood on the surface of otherwise normal stool usually points to the lower gut or rectum and is often linked to a fairly minor, treatable cause, but it still needs a vet to confirm rather than being assumed safe.

What does dark or black poo mean?

Dark, tarry-looking poo can suggest bleeding further up the digestive system and is generally treated as more urgent by vets than bright red blood. Report it accurately when you call, including how it looked and smelled if you noticed anything unusual.

Should I stop feeding my puppy if they have blood in their poo?

Do not withhold food or water without your vet's specific advice, since a puppy who is unwell still needs to stay hydrated and supported. Your vet will tell you if a short period of fasting or a bland diet is appropriate once they have assessed your puppy.

Can worms cause blood in a puppy's poo?

Yes, worms are one of the more common and usually manageable causes of blood appearing in a puppy's stool. Your vet can confirm this with a simple check and advise on appropriate worming, rather than guessing from symptoms alone.

How quickly should I get my puppy seen?

The same day, ideally as soon as you notice it, rather than waiting overnight to see if it settles. Puppies can deteriorate faster than adult dogs, so an appointment sooner rather than later gives your vet the best chance to help quickly.

Related

• Blood in a puppy's urine — what to do
• My puppy is constipated
• Blood in your dog’s poo — what it means
• Blood in your cat’s poo — what it means
• Blood in my kitten's poo — what to do
• Blood in your cat’s urine — ring a vet