Preparation
1Bake your saved eggshells at 250°F for 10 minutes until they're dry and crumbly. Let them cool, then crush them in a zip-lock bag with a rolling pin until you've got a coarse grit — think "chunky sand," not powder.
2Finely chop the kale into tiny pieces (your hens will try to steal entire leaves and run away with them if you don't — it's chaos, and not the productive kind).
3Toss the crushed eggshell, chopped kale, and sunflower seeds together in a bowl. If you're using the yogurt, fold it in last so it lightly coats everything like a mineral-rich dressing.
4Scatter it in their dish or directly on the ground for a foraging experience, and stand back.
Best Time to Serve
Morning, alongside their regular feed
Purpose
When your hens start laying eggs you could poke a finger through, it's time to intervene. This crumble delivers a triple-source calcium hit combined with vitamin D to make sure those minerals actually get absorbed and deposited where they belong — into thick, gorgeous eggshells. Think of it as prenatal vitamins, but for chickens who are tired of their own eggs cracking in the nesting box.
When to Use
Best used during peak laying season or whenever you notice thin, rough, or oddly-textured shells. Also great for pullets just starting to lay who haven't quite figured out the calcium game yet.
What to Expect
A coarse, sandy-looking crumble with flecks of white, gold, and dark green. It smells faintly earthy and mineral-rich — your hens will zero in on it the second it hits the dish, picking through it with the intensity of tiny prospectors panning for gold.
Does Not Fix
Won't increase how many eggs your hens lay — just makes sure the ones they do lay actually survive the journey from vent to nesting box.
Time to Effect
5-7 days for noticeably firmer shells.
Safety Risks
Always bake eggshells before feeding back — raw shells can introduce bacteria and teach hens to eat their own eggs.
Do not feed this mix to roosters or non-laying hens regularly; they don't need the calcium surplus and it can stress their kidneys.
If you notice chalky white droppings, cut back the portion — that's excess calcium being flushed.
Enrichment Ideas
Easy: Scatter it across a wide area so the whole flock has to forage instead of one bossy hen hoarding the bowl.
Medium: Mix it into a shallow tray of dirt so they have to scratch and dust-bath their way to the good stuff.
Hard: Freeze the yogurt-coated version into a shallow ice disc for a hot-day calcium lick that takes time to work through.
Owner Tips
Start saving eggshells in a jar on your counter — you'll burn through them faster than you think once you see the results.
If one hen is laying soft shells but the others aren't, she might need this as a solo side dish away from the flock — dominant hens will monopolize communal food.
The kale stems are fine to include; chickens will demolish them. Don't waste your time removing them.
You can batch-bake and crush a month's worth of eggshell grit at once and store it in a mason jar.
Watch for "the scramble dash" — the moment you set this down, your fastest hen will grab a sunflower seed and sprint across the yard with four others chasing her. It never gets old.
Backyard Birds
Use with Caution
