Not furry either, still lovely.
Dairy Cow Isopod
Porcellio laevis
Also called Swift woodlouse, Smooth slater, Dairy cow panda isopod, Porcellio laevis 'Dairy Cow'
From A colour morph of Porcellio laevis. Sources differ on the species' original home: English Wikipedia suggests North Africa, German Wikipedia southern and western Europe. It is now found worldwide thanks to human transport.12
At a glance the quick version
Looks how to spot one
Smooth, segmented exoskeleton
A large woodlouse with a notably smooth, un-bumpy back. The 'dairy cow' form is patched black and white like a Friesian cow; males have long, spear-shaped tail appendages.13
Personality what they are like
Harmless and busy. If disturbed it often freezes for a moment and then dashes for cover; it is one of the quicker woodlice and is also active in daylight.12
Daily activity how busy a day looks
An active forager that roams the substrate and leaf litter; give it room and plenty of hiding spots.12
Grooming and care the hands-on bits
No grooming. Keep part of the enclosure moist, as woodlice lose water easily, and remove mouldy leftovers.41
Home where they are happiest
A tub or terrarium with damp, organic-rich substrate, leaf litter and bark, similar to the compost heaps and old garden debris it lives in.34
Food basics what goes in the bowl
A detritivore: dead leaves, rotting wood, moss, lichen and other decaying plant matter, plus vegetable scraps.14
Company who they like around
The story where it all began
The species was described in 1804 and has spread around the world with people, turning up in gardens, stables and farms. Breeders developed striking colour forms such as dairy cow, white and orange, which made it a hobby favourite.13
Fun facts for the dinner table
- 1
Males escape danger by running in alternating left-right turns, and get better at it with practice.1
- 2
Females carry eggs and babies in a fluid-filled pouch under the body.1
- 3
Woodlice moult in two halves, the back half first and the front a few days later.4
- 4
The name laevis means smooth, describing its sleek back.1
Recognised by the official bits
- Taxonomy (via Wikipedia)
- Porcellio laevis was named by Pierre André Latreille in 1804. 'Dairy cow' is a hobby name for its black-and-white piebald form.1
- British Myriapod and Isopod Group
- Listed as Nationally Scarce in Britain, Least Concern on the IUCN scale.3
The care rhythm Furry Diary remembers it for you
A typical home-care rhythm for a Dairy Cow Isopod. It is our own starting plan, not a vet's advice, and you can change every line in the app.
- Humidity checkevery 2 days
- Water dishevery 2 days
- FeedingDepends on species, size and moult stagevaries
- Spot cleanRemove leftover foodevery week
- Moult noteLeave them in peace while moulting and note it in the diaryvaries
- Substrate changeevery 6 months
Owner questions the things everyone asks
How often should I feed my Dairy Cow Isopod?
Feed your isopod a few times a week, offering small amounts of dead leaves, rotting wood, and vegetable scraps. Remove any leftover food after a day or two to keep the enclosure fresh. For exact amounts, check the food label and ask your vet.14 Furry Diary plan
What does a Dairy Cow Isopod eat, and what should it never eat?
They eat dead leaves, rotting wood, moss, lichen, and vegetable scraps. Never feed them anything with salt, spices, or preservatives, and avoid citrus or acidic foods. Stick to natural decaying plant matter for a healthy diet.14
How much space does a Dairy Cow Isopod need?
A small tub or terrarium with damp, organic-rich substrate, leaf litter, and bark works well. Provide enough room for them to roam and hide, as they are active foragers. A 10-gallon tank is a good starting size for a small colony.34
What temperature, light or water does a Dairy Cow Isopod need?
Keep the enclosure at room temperature, around 65, 75°F, with a moist area and a drier area. They need high humidity, so mist one side every couple of days. No special lighting is needed, but avoid direct sunlight.41 Furry Diary plan
How often should I clean a Dairy Cow Isopod's home?
Spot clean weekly by removing leftover food and any moldy bits. Change the entire substrate every six months or so. This keeps the environment healthy for your isopods. Furry Diary plan
Can a Dairy Cow Isopod live with others?
Yes, they thrive in colonies and should be kept in groups. They are peaceful and busy, and they enjoy the company of their own kind. Avoid housing them with larger pets that might see them as food.14
How long does a Dairy Cow Isopod live?
They typically live for about 2 to 3 years with proper care. Their lifespan depends on diet, humidity, and overall habitat quality. A good setup helps them reach their full potential.14
Can I handle a Dairy Cow Isopod?
Handling is possible but they are quick and may dash for cover if startled. It's best to let them crawl onto your hand gently and avoid squeezing them. They are harmless and can be observed closely without stress.12
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Furry Diary's own starting care plan. A friendly guide, not a vet's advice.
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Where this comes from
Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at [email protected] and we will fix it.
- Porcellio laevis - Wikipedia en.wikipedia.orgused for names, size, morphs, behaviour, diet, reproduction, history, captivity
- Porcellio laevis - German Wikipedia de.wikipedia.orgused for size range, origin, behaviour
- Porcellio laevis - British Myriapod and Isopod Group bmig.org.ukused for description, habitat, status
- Woodlouse - Wikipedia en.wikipedia.orgused for moisture needs, diet, moulting, keeping as pets
- VCA Animal Hospitals: Feeding times and frequency for your dog vcahospitals.comused for owner questions
- ASPCA: Dog grooming tips aspca.orgused for owner questions
- ASPCA: Cat grooming tips aspca.orgused for owner questions
- ASPCA: People foods to avoid feeding your pets aspca.orgused for owner questions
- RSPCA: What to feed your rabbit rspca.org.ukused for owner questions
Checked 2026-09-30. Text is written in our own words from these sources.