Hedgehog blood in the bedding: finding where it comes from

Quick answer

Red or brown staining in a hedgehog's bedding is one of the most common reasons owners ring a vet, and one of the hardest things to interpret from the enclosure alone.

Hedgehog being held gently

The problem is mixing. A hedgehog urinates, defecates and often bleeds while running, then spreads all three around the wheel and through the bedding. By morning the evidence has been stirred together, and the important question, which is where the blood came from, has been erased.

• Blood in a hedgehog's bedding is not automatically urinary. The reproductive tract, the gut, the mouth and the feet all produce the same stain.
• In an older entire female, the reproductive tract is one of the leading answers, and it needs surgery rather than antibiotics.
• The single most useful thing you can do at home is separate the sources before you call the vet.
• Not all red is blood. Beetroot, red or purple fruit, coloured kibble and some treats will colour urine and stool.
• Straining, vocalising while urinating, or passing frequent small amounts are urinary signs that override everything else and mean go now.

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An entire female hedgehog with blood at the vulva needs a veterinary appointment, not a course of antibiotics and a wait.

Uterine disease is common in older female hedgehogs and it progresses. Blood loss is one problem, but the more serious issue is that the underlying disease continues while the bleeding appears to settle down. A bleeding episode that stops on its own is not the same as a problem that has resolved.
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Why this is hard to read, and how to fix that tonight

The enclosure of a nocturnal running animal is a bad laboratory. Everything is mixed and smeared, and the hedgehog does most of it while you are asleep.

You can turn the enclosure into a usable one for a single night.

Take the wheel out for one night.

This is the highest-value step and the one owners resist most. Without the wheel, material stays where it was produced rather than being spread over a metre of running surface. It also removes the commonest source of foot injuries from the picture.

One night without a wheel is not a welfare problem. Several nights would be, so put it back and repeat the test another night if you need to.

Put down a plain, pale, non-absorbent surface.

A clean white tile, a sheet of plastic, or a plain light-coloured fleece liner under the sleeping area and the toilet corner. Absorbent bedding hides volume and colour. A hard surface tells you the size of the puddle, the colour, and whether the blood is in the urine or beside it.

Hedgehog near a scale and bowl

Look at the position of the stains.

Blood mixed evenly into a puddle of urine suggests it came from the urinary tract. Drops or clots sitting separately from any urine, particularly near where the hedgehog sleeps, suggest the reproductive tract. Blood only on the stool suggests the gut. Blood in a trail near the food bowl suggests the mouth.

Photograph everything before you clean it, with something for scale.

A coin next to the stain. Photos taken the night before an appointment are worth more than a description given a week later.

Where the blood can be coming from

The reproductive tract, in an entire female.

This is the answer often enough that it should be your first thought in any female that has not been spayed, and particularly in an older one. Disease of the uterus in hedgehogs produces intermittent bleeding that owners naturally interpret as bladder trouble.

The features that point this way are blood appearing without urine, blood or clots at the vulva, spotting on the bedding where she sleeps rather than where she toilets, and blood that comes and goes over weeks. Weight loss and a drop in activity often accompany it.

This is a surgical problem. Antibiotics may quieten a secondary infection but they do not treat the underlying disease.

The bladder and urethra.

Cystitis, bladder stones, and bladder masses. The characteristic picture is blood evenly mixed through the urine, or heaviest at the end of the stream, along with behavioural signs: squatting repeatedly, producing small amounts, straining, and sometimes vocalising.

Stones produce the most dramatic version, including partial or complete blockage. A hedgehog straining and producing nothing is an emergency, because a blocked urethra causes bladder rupture and kidney failure quickly.

The kidneys.

Chronic kidney disease is a common finding in older hedgehogs. Frank blood is less typical here. The picture is more often weight loss, increased drinking, larger volumes of dilute pale urine, poor appetite and a dull coat. Blood, when it occurs, is usually a smaller amount mixed uniformly.

The gastrointestinal tract.

Fresh red blood on or around the stool comes from the lower gut. Digested blood from higher up turns the stool black and tarry, which looks like very dark normal stool and is easy to miss on dark bedding. Green, loose or bloody stool with a hedgehog that is off food is a separate urgency of its own.

The mouth.

Dental disease is common in hedgehogs and bleeding gums are part of it. The blood ends up on the food, on the bedding, and groomed into the coat around the face. A hedgehog with a bloody mouth often also drops food, eats more slowly, or has developed a preference for softer food.

Hedgehog eating from a dish

The feet and nails.

A torn nail or a cut footpad bleeds surprisingly freely and then gets printed all around a wheel, which makes a small injury look like a catastrophe. Look at the feet before you look anywhere else if the blood is distributed in a running pattern.

The skin and quills.

A damaged quill follicle, a bite, a mite-related sore or self-trauma from itching all bleed a little. These are usually visible once the hedgehog will unball, and they are usually associated with scratching or with an area the animal keeps returning to.

Not blood at all.

Beetroot, berries, red or purple vegetables, artificially coloured treats and some coloured kibbles all pass through and stain. Concentrated urine from a hedgehog that has not drunk enough can look dark orange. Two days without the suspect food answers this cheaply, and it is worth doing before an anaesthetic.

Telling them apart

How the picture develops if it is left

Early.

A single small stain, an animal that is otherwise completely normal, eating, running and at a stable weight. This is the stage at which owners wait, and it is the stage at which most of these conditions are easiest to treat.

Established.

Staining most nights. Subtle changes appear alongside: slightly less wheel distance, slightly less food taken, a few grams lost each week, more time in the sleeping bag. Because hedgehogs are nocturnal and ball up when handled, all of this is easy to miss without a weight log.

Late.

Visible weight loss, a hedgehog that will not unball, pale gums, laboured breathing from anaemia, or a hedgehog straining unproductively. In the case of urinary blockage this stage arrives in hours rather than weeks.

The gap between early and late is where the outcome is decided, and the only thing that reliably detects it is a weekly weight on a gram scale written down.

Getting a urine sample the vet can use

A urine sample changes what can be found at the first appointment: blood that is not visible to the eye, crystals, infection, protein, and concentration, which is the measure that separates kidney disease from bladder disease.

Why freshness matters.

Cells break down and crystals form or dissolve as a sample sits and warms. A sample more than a few hours old, or one that has been at room temperature all day, gives misleading answers about both crystals and cells.

Why a contaminated sample is still worth taking.

A sample scooped off a tile is not sterile and cannot be used to grow a culture. It can still show blood, protein, glucose and concentration, all of which narrow the search. The vet can take a sterile sample directly from the bladder if a culture is needed.

What the vet will want besides the sample

What never to do

Do not start a leftover course of antibiotics. If a culture is later needed, prior antibiotics make it unreliable, and a bleeding female with uterine disease will appear to improve while the disease continues.

Do not restrict water in the hope of reducing the staining. Concentrated urine irritates an inflamed bladder and makes stone formation more likely.

Do not give cranberry products, apple cider vinegar or other urinary home remedies. There is no evidence base for them in this species and they delay a diagnosis that is time sensitive.

Do not clean everything away before you have photographed it. Owners routinely arrive at an appointment with nothing to show.

Do not assume a male hedgehog cannot have a reproductive cause. Prostatic and penile problems occur, and blood from the preputial area looks the same as blood from the urinary tract.

Do not accept "it stopped on its own" as an ending, particularly in an entire female. Intermittent bleeding is characteristic of the conditions that most need treating.

Do not wait through a weekend on a hedgehog that is straining without producing urine.

When to get help

Go immediately if the hedgehog is straining and producing no urine, has a tense and painful abdomen, has pale gums, or will not unball at all.

Book the same day for straining, frequent small urinations, vocalising while urinating, or blood with any loss of appetite.

Book within the week for repeated staining in an otherwise well hedgehog, and bring a urine sample, your photographs and your weight log with you.

Hedgehog on a wooden floor