Hedgehog droppings: green, loose and bloody stool decoded

Quick answer

A hedgehog's droppings are the most sensitive daily readout you have. They arrive on the wheel every night, in a place you can see, in an animal that otherwise hides illness completely.

Normal is dark brown to nearly black, firm, cylindrical, slightly tapered, and holding its shape. Green, loose, mucous, bloody or tarry droppings each point in a different direction, and the colour tells you about transit time rather than about a specific disease.

The wheel is a nightly record. Look at it before you clean it, every morning.

• Green usually means food is moving through too fast, or that almost nothing is moving through at all.
• Check the enclosure temperature before you assume gut disease. A chilled hedgehog stops digesting.
• One odd dropping in a bright, eating hedgehog is worth watching. Two nights of green with reduced appetite is a vet visit.
• Weigh daily while droppings are abnormal. A small insectivore that stops eating develops fatty liver quickly.
• Hedgehogs carry Salmonella without looking ill. Wash hands after every contact with the animal or its enclosure.

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A hedgehog that has stopped eating is on a short clock.

Hedgehogs mobilise body fat rapidly when intake falls, and that fat overwhelms the liver, producing hepatic lipidosis. A hedgehog with abnormal droppings that also refuses food, loses weight, or becomes wobbly and unresponsive needs veterinary care the same day. Never fast a hedgehog to rest the gut, which is standard advice for some species and dangerous in this one.
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Decide in 60 seconds

Why colour tells you about speed

Bile is released into the small intestine as a green pigment. As it passes down the gut, bacteria progressively break it down and it darkens to the brown that owners recognise. That conversion takes time.

This gives colour a simple meaning. If a dropping arrives still green, either it travelled through too quickly for the conversion to happen, or there was so little food present that what you are seeing is mostly bile.

That is why green stool appears in two very different situations that look opposite from the outside: a hedgehog with diarrhoea that is eating well, and a hedgehog with almost no appetite that is passing very little. Both produce green. The way to tell them apart is the volume, the consistency, and the animal's weight.

Green is therefore a signal to investigate, not a diagnosis. The list of things that speed transit or stop intake includes diet change, fat overload from too many rich insects, stress, cold, parasites, bacterial infection, liver disease and tumours.

What normal looks like, and how much varies

A healthy adult hedgehog produces a consistent number of droppings each night, generally spread along the wheel surface. Learn your own animal's usual count and appearance, because that baseline is worth more than any general description.

Normal colour runs from dark brown to almost black. Diet shifts it. A hedgehog eating a lot of a particular kibble, or offered coloured vegetables, will produce droppings tinted by them, and this is not a problem provided the shape and consistency are unchanged.

A daily weight taken at the same time turns a vague worry about droppings into a trend a vet can act on.

Insect fragments are normal. Chitin is largely indigestible, so wing cases, legs and head capsules pass through visibly. Whole undigested insects, rather than fragments, suggest transit is too fast.

Consistency should be firm enough to lift in one piece. Soft but formed is acceptable for a day after a diet change. Anything that has no shape at all is diarrhoea.

Frequency drops in a hedgehog that is eating less, and rises with a diet richer in moisture. A hedgehog that has recently been given more insects, or wet food, will produce softer droppings for a day or two.

Age matters. A young growing hedgehog eating heavily produces more, and a senior hedgehog eating less produces fewer and often drier droppings. A sudden change in either direction is what counts.

The causes, roughly in order

Diet change and fat overload.

The most common cause by a wide margin. A new kibble introduced overnight, a switch of protein source, or a generous run of mealworms and waxworms produces loose green stool within a day. Rich insects are very high in fat, and the gut responds to a fat load it was not prepared for.

The fix is a slow transition over one to two weeks, mixing increasing proportions of the new food, and treating fatty insects as an occasional item rather than a staple.

Cold and attempted hibernation.

Domestic hedgehogs kept below their thermal comfort range attempt to hibernate, and they do it badly. Digestion slows and then stops, the animal becomes cold to the touch, curls tightly, and becomes wobbly and unresponsive. Droppings stop or become scant and dry. Always check the enclosure temperature before you look for a gut disease.

Stress.

A new home, a house move, a change of room, a new pet, or a period of handling by an unfamiliar person all speed gut transit. Stress-related green stool resolves within a few days if the animal is eating and the stressor is removed. If it does not resolve, it was not stress.

Internal parasites.

Coccidia and various worms occur, and the risk rises considerably if the hedgehog is fed wild caught insects or has been housed on soil or in contact with other hedgehogs. Parasitic diarrhoea tends to be persistent rather than one off, and it needs a faecal examination to identify. Guessing at a wormer wastes time and does not treat protozoa.

Bacterial infection and dysbiosis.

Salmonella is the one to keep in mind because it also matters to the household. Clostridial overgrowth and other bacterial imbalances often follow a course of antibiotics given for something else. Foul smelling, watery or bloody diarrhoea belongs in this group.

Liver disease.

Hepatic lipidosis follows any period of not eating and is the reason a hedgehog with poor appetite becomes an emergency faster than owners expect. Pale or greasy droppings, jaundiced skin visible on the belly and ears, and a hedgehog that is quiet and unwilling to eat all point here.

Tumours.

Hedgehogs have a high rate of neoplasia from middle age onwards. Gastrointestinal tumours produce chronic weight loss, intermittent diarrhoea, and sometimes blood. A hedgehog over about two years old with persistent gut signs and steady weight loss should be examined properly rather than treated repeatedly for suspected parasites.

Blood: the distinctions that matter

Bright red on the surface of a formed dropping.

Fresh blood from the lower gut, rectum or anus. Causes include colitis, straining, a rectal or intestinal prolapse, and injury. It sits on the outside because it entered after digestion was finished.

Black, sticky, tarry droppings.

Digested blood from the stomach or small intestine, called melena. This is not a colour that food produces. It is a same day veterinary problem.

Blood mixed through loose stool.

Inflammation along the length of the colon. Usually infection or severe inflammatory disease.

Blood on the wheel with normal droppings.

This is the one that catches owners out. Urine, uterine discharge and droppings all land on the same running surface. In an unspayed female hedgehog, bleeding from uterine disease is common and appears as blood on the wheel or on bedding with the droppings themselves entirely normal. Blood in urine from bladder disease or stones looks similar.

If you cannot tell which it is, put the hedgehog in a clean container lined with white paper for a short period and look at where the blood actually appears.

Red that is not blood.

Beetroot, carrot, red kibble dye and some treats colour droppings. If the animal is well, eating, and the colour matches something it ate, wait a day.

What to change first, and what to record

Check the enclosure temperature with a thermometer at the level the hedgehog lives, not on the wall. Correct any cold before anything else.

Weigh daily on a gram scale at the same time of day. Write it down. A downward trend over three days changes the urgency of everything else.

Bright eyes, clean spines and an animal that unrolls readily are the background against which you read the droppings.

Stop all new foods, treats and insects, and go back to the diet the animal was on when its droppings were normal. Do not introduce a third food to fix the second.

Photograph the droppings on plain white paper, with something for scale, before you clean them away. Colour is very difficult to describe accurately and impossible to recall a week later.

Collect a fresh sample for the vet. Fresh matters: parasites are far easier to find in a sample a few hours old than in one from yesterday. Keep it in a sealed clean container in the fridge, not the freezer.

Check hydration. Skin over the shoulders should spring back when lifted gently. A hedgehog that is slow to return has lost significant fluid.

Wash your hands after every contact, and keep the enclosure and its cleaning equipment away from food preparation areas.

The routine that catches problems early

What never to do

Do not withhold food to settle the gut. In a hedgehog, that starts liver disease.

Do not offer milk, yoghurt or cheese. Hedgehogs do not digest lactose and dairy causes diarrhoea directly.

Do not feed wild caught insects. They carry parasites and may have been exposed to garden pesticides.

Do not switch diets repeatedly in search of one that firms the stool. Each switch causes another few days of loose droppings and hides the original problem.

Do not treat blindly with a wormer bought online. Most hedgehog gut parasites need identification first, and several common products do not treat protozoa at all.

Do not clean the wheel before you have looked at it.

Do not assume blood on the wheel came from the gut without checking whether it came from the urinary or reproductive tract.

When to get help

Go the same day for blood of any kind, black tarry droppings, watery diarrhoea, refusal to eat, a hedgehog that feels cold or is wobbly, or a hedgehog whose weight has fallen for three days running.

Go immediately for a cold, tightly curled, unresponsive hedgehog, for tissue protruding from the back end, or for a hedgehog that is straining without producing anything.

The goal is a hedgehog back to firm dark droppings, a steady weight, and a normal night on the wheel.

Book a routine appointment for droppings that have been intermittently soft or green for more than a week, for gradual weight loss in an older hedgehog, or for any female over about two years old with blood on the bedding.

Bring a fresh faecal sample, the weight record, photographs of the droppings on white paper, the exact diet including the brand of kibble and the species and number of insects fed, the enclosure temperature, and whether the animal is spayed or neutered. Expect a faecal examination, a weight and body condition assessment, and in an older hedgehog a discussion about imaging.