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Yes, mice can eat kale, and it is one of the best greens for them. RSPCA Australia names kale among the dark greens pet mice should be offered, and Supreme Petfoods lists it as an everyday food. Give each mouse a small torn piece of washed leaf, about the size of your thumbnail, with the tough stem removed, as part of the day's food.
| Safe? | Yes, an everyday green |
| How much | A torn piece of leaf about 2 cm (¾ in) across per mouse |
| How often | Daily, or most days in rotation with other greens |
| Best served | Raw, washed, stem removed, torn small |
| Watch out for | Overfeeding, seasoned kale crisps, leftovers going off |
Is kale safe for mice?
Yes. RSPCA Australia tells owners to offer fresh dark greens and non-starchy vegetables and names kale, broccoli, parsley, beet greens and bok choy (pak choi) as examples. Supreme Petfoods, a small-pet food maker, puts "green leafy vegetables such as broccoli and kale" in its "always" group for mice. Woodgreen, the UK animal charity, suggests small chopped pieces of curly kale as a treat.
Kale is low in sugar and gives a mouse something leafy to pull at and nibble, which is good for a natural forager.
How much kale can a mouse have?
Woodgreen puts a mouse's dry food at about 5 g (0.2 oz) a day, around one level teaspoon. Both RSPCAs say fresh food belongs inside that daily allowance, not on top of it, and PetMD keeps everything other than the main food under 10% of what a mouse eats. Kale leaves are light, so a torn piece about 2 cm (¾ in) across per mouse fits easily. Two or three mice sharing a cage can have a small leaf torn into pieces and scattered, so everyone gets some.
If a mouse leaves its pellets or nuggets and fills up on greens, cut the greens back. The main food is what keeps a mouse balanced, as our pet mouse diet guide explains.
How to prepare kale for mice
- Wash it well. Curly kale traps grit and spray in its folds, so rinse it under cold running water and shake it dry.
- Strip the stem. Pull the leaf off the thick central stem, which is tough and woody.
- Tear it small. Tear a piece about 2 cm (¾ in) across for each mouse.
- Scatter it. Tuck it in with the dry food or hide it around the cage.
- Clear up. Wilted leaves go off fast. PetMD says to remove uneaten fresh food within 10 hours.
Curly kale, cavolo nero, cooked kale and kale crisps
- Curly kale: the type Woodgreen names, and easy to buy.
- Cavolo nero (lacinato or Tuscan kale) and red kale: the same plant, served the same way.
- Stems: the thick midrib is very fibrous. Our sources do not cover it, so we leave it out.
- Cooked kale: plain steamed and cooled is fine, but raw is simpler and what the sources describe.
- Kale crisps (chips): no. They are usually oiled, salted and seasoned, sometimes with garlic or onion, which PetMD lists among foods mice should not have.
Thread a strip of kale through the bars or tuck it between two layers of cardboard. Pulling it free turns a scrap of greens into a foraging game.
Which mice should go easy on kale?
Start any new mouse with a crumb-sized piece and wait a day, because a sudden change of food can upset a small gut. Skip greens while a mouse has soft droppings or a wet bottom, and see our pet mouse health guide if it lasts.
What else can mice eat instead?
Rotate kale with broccoli, a little darker-leaved cabbage and, now and then, spinach. The whole list is on what can mice eat, and our pet mouse care guide covers everything else.
Kale questions
Can mice eat kale every day?
Yes, a small piece. RSPCA Australia names kale among the dark greens mice can have as part of the daily allowance, and Supreme Petfoods lists it as an "always" food. Swap it with broccoli and other greens across the week so your mice get variety.
Can mice eat kale stems?
Can mice eat cooked kale?
Plain steamed kale, cooled, is fine, but there is no need to cook it. Kale cooked for people usually has oil, salt or garlic, and PetMD lists garlic among the foods mice should not have. Raw, washed kale is what our sources describe.
Is kale better than lettuce for mice?
Yes. The RSPCA in the UK says not to feed mice lettuce because it can cause diarrhoea, while RSPCA Australia names kale among the greens to offer. Kale is the safer and more useful leafy green.
