Kale delivers a rare combination: high calcium for laying hens and lower oxalates than spinach, meaning the calcium your birds eat is actually absorbed. Feed daily as part of a greens rotation, or hang a bunch from the coop ceiling for enrichment.
Kale ranks among the super greens for flocks because no other common vegetable delivers this combination of vitamin K, vitamin A, vitamin C, and bioavailable calcium in a single feed.
Below: the full nutrition breakdown, which kale varieties to choose, how to introduce it to reluctant birds, how to grow it as dedicated chicken fodder, and one scenario worth watching.
The sections below cover kale's nutritional profile, the oxalate advantage over spinach, how to use kale as coop enrichment, and how to grow it specifically as chicken fodder.
- Calories: 49 kcal. low energy density, feeds generously without displacing layer pellets
- Vitamin K: 817 mcg. exceptionally high; supports bone metabolism and blood clotting in poultry
- Vitamin A: 241 mcg RAE. supports immune function, eye health, and reproductive performance in layers
- Vitamin C: 120 mg. immune support; chickens synthesize some on their own but benefit from dietary sources during heat stress
- Calcium: 150 mg per 100g. significant for laying hens, and more bioavailable than spinach calcium due to lower oxalate content
- Oxalates: Moderate and substantially lower than spinach, meaning calcium binds less and is absorbed more efficiently
Is Kale Safe for Chickens? Verdict on All 3 Kale Varieties
All three varieties found in most grocery stores and home gardens are safe for chickens There. There are no toxic compounds in kale at any growth stage, in any preparation.
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| Variety | Safe for Chickens | Best Use | Notes |
|---|---|---|---|
| Curly kale | Yes | Hanging bunches, chopped in run | Most widely available; ruffled leaves hold up well when tied and hung; stems are thick but chickens manage them |
| Lacinato (dinosaur) kale | Yes | Hanging bunches, torn into run | Dark blue-green leaves; slightly more tender than curly; same nutritional profile; excellent garden variety for fodder growing |
| Red Russian kale | Yes | Chopped treat, mixed with feed | Softer, more deeply lobed leaves; lower structure makes it less suited for hanging but fine as a scattered treat; cold-hardy garden variety |
Curly kale and lacinato kale hold their structure better when tied into a bundle and hung from a coop rafter, making them the stronger choice for enrichment use. Red Russian kale works well chopped and scattered or mixed with other greens.
Kale vs. Spinach: Why Kale Calcium Is More Bioavailable for Laying Hens
Calcium absorption is the central difference between kale and spinach for laying hens. Both greens contain calcium, but spinach is high in oxalic acid, which binds to calcium and forms calcium oxalate crystals that pass through the digestive tract unabsorbed.
Kale has substantially lower oxalate levels. The calcium in kale is available for actual use: shell formation, bone maintenance, and normal metabolic function in laying hens.
- Spinach calcium: High on paper (99 mg per 100g), but significant portion is bound by oxalates and not absorbed
- Kale calcium: 150 mg per 100g with low oxalate content, making a larger share of it bioavailable
- Practical implication: For high-production layers, kale is a better calcium-supporting green than spinach when fed at equivalent quantities
- Still supplement: Oyster shell on the side remains the primary calcium source for layers; kale is a dietary bonus, not a replacement
For a direct oxalate comparison with spinach, the key takeaway is this: both are safe to feed, but kale is the better regular green for layers specifically because of this absorption advantage.
Compared to lettuce varieties commonly used as everyday greens, kale outperforms romaine on calcium (150mg vs 33mg per 100g) and vitamin K (817mcg vs 102mcg), making it the stronger choice when you want the greens rotation to do nutritional work beyond simple hydration.
How to Use Kale as Coop Enrichment: Hanging Bunches for Pecking Activity
Kale works as a hanging enrichment tool in the same way as cabbage, and it is effective at redirecting flock energy during periods of confinement. Tie a full bunch of kale, stems up, from a coop rafter or run wire so the leaves hang at roughly beak height for your hens.
- Tying method: Bind several stalks together at the base with twine or zip ties, then hang so leaves are accessible but the bunch swings freely. The movement prevents one dominant hen from monopolizing it.
- Duration: A full bunch of curly or lacinato kale in a 6-8 bird flock typically lasts one to two sessions, shorter than a whole cabbage head but still effective for an afternoon's activity.
- Winter value: Kale stores well in cold temperatures and continues growing in the garden through light frost, making it one of the most practical winter greens for flock enrichment when other fresh produce is scarce.
- Alternative to cabbage: For flocks that have gone through a cabbage rotation and need variety, rotating in kale bunches keeps enrichment novel and the nutritional profile shifts favorably with kale's higher vitamin K and calcium content.
For Rock winter nutrition, kale is particularly useful: Plymouth Rocks are cold-hardy birds that do well in winter confinement, and hanging kale bunches provides both nutrition and behavioral stimulation during the long periods when they cannot forage outside.
Hanging a bunch keeps most of the leaves off the ground, but check and remove any fallen leaves that chickens have knocked down during a feeding session.
How to Introduce Kale to Chickens That Refuse New Foods
Chickens can can be conservative about unfamiliar foods, particularly greens with a strong smell or bitter edge. Kale has a mild bitterness that some flocks accept immediately and others ignore for several days before investigating.
If your flock ignores the first offering, use a bridging approach rather than pulling the kale and waiting.
- Mix with preferred treats: Chop kale into small pieces and mix it with a food the flock already reliably eats, such as cracked corn, mealworms, or a greens they already accept. Familiar foods lower the barrier to trying something new.
- Wilt slightly first: Some keepers find that briefly wilting or blanching kale in hot water reduces the bitterness enough that reluctant birds accept it faster. It also softens the leaves and makes them easier to tear apart.
- Persist over several days: Chickens often ignore a new food the first day, investigate it the second, and eat it confidently by the third or fourth. Do not conclude that your flock dislikes kale after a single offering.
- Frost-sweetened kale as an entry point: If you grow kale in the garden, wait until after the first frost and offer garden-harvested kale first. The sweeter flavor profile tends to get faster acceptance than store-bought kale harvested before frost exposure.
Growing Kale as Dedicated Chicken Fodder
Kale is one of the few vegetables where growing it specifically for flock use makes practical sense. It is low-maintenance, cold-hardy, and productive enough that a small patch provides a meaningful supplement to the feed budget across a long growing season.
Kale grows in most climates, tolerates poor soil better than many vegetables, and continues producing leaves for months rather than giving a single harvest like head lettuce. Cut outer leaves as needed and the plant keeps producing from the center.
- Best varieties for fodder: Lacinato (dinosaur) kale and Siberian kale are the most cold-hardy and longest-producing. Both will overwinter in mild climates and produce through hard frosts in colder zones.
- Planting for flock access: Some keepers plant kale along the outside perimeter of the run so chickens can peck leaves through the wire. This eliminates the harvest step entirely and provides a continuous browsing opportunity.
- Seed cost vs. return: A single seed packet ($2-4) planted in spring will supply enough kale for a 4-6 bird flock from summer through late fall without any additional cost beyond water.
Kale and other cruciferous options like broccoli form a compatible garden rotation: plant broccoli for spring and early summer, then transition to kale for late summer through winter when broccoli has bolted. The flock gets continuous access to fresh brassica greens across the full growing season.
Good coop and run planning accounts for a perimeter browse strip where kale or other greens grow just outside the wire, giving confined birds access to fresh foliage without needing daily harvest from the keeper.
Can Chickens Eat Kale Stems? Raw vs. Cooked Kale Compared
Kale stems are edible for chickens They. They are tougher than the leaves and take more effort to break down, but chickens peck through them without difficulty, particularly once the stem is cut into shorter sections.
There is no toxicity concern with stems at any size.
Raw kale is the preferred form for enrichment use and for maximum vitamin C retention, which is heat-sensitive. Cooked kale is fine as a treat from kitchen scraps.
- Raw: Best for hanging bunches and for retaining full vitamin C and vitamin K content. Preferred for enrichment value. Lasts longer before wilting than cooked kale.
- Cooked (plain): Fine as a scattered treat. Use only unseasoned, unsalted kale. Kale cooked with garlic, onion, butter, or salt is not appropriate for chickens.
- Frozen and thawed: Thawed kale that was previously frozen is safe and often accepted well because freezing breaks down cell walls and softens the texture. A practical way to use freezer-burned kale from your own kitchen.
For a comparison of safe brassica family treats across the full cabbage and kale family, the feeding rules are consistent: raw or plain-cooked, no seasoning, and remove leftovers within 24 hours.