Grit and oyster shell are often mentioned in the same breath, but they do something quite different. Grit consists of hard little stones that stay in the gizzard and help grind feed there. Oyster shell does dissolve and supplies calcium for the eggshell. In this collection you will find, among others, Kasper Faunafood Hobbyline chicken grit.
What does grit do and what does calcium do?
| Grit | Oyster shell | |
|---|---|---|
| Function | Grinds grains and fibre in the gizzard | Tops up calcium for forming the eggshell |
| Needed with | Grain, grass and other fibrous feed | Laying hens, especially in busy laying periods |
| Sign of a shortage | Undigested grains in the droppings | Thin or soft eggshells |
When do you offer it separately?
Free-range chickens on bare ground pick up small stones themselves. If they are in a run with sand, paving or wood chips, or you keep them indoors for a while, put out grit separately. The same applies if you scatter a lot of mixed corn.
Calcium is already in a good layers feed. A separate dish of oyster shell acts as a reserve: a hen that needs more helps herself. So do not mix calcium into the feed, but give it separately, so cockerels and non-laying hens do not take in unnecessarily large amounts.
How to put it out
Use a small, stable dish or trough that does not tip over and is not out in the rain, so it stays dry and clean. Top up regularly and replace it if droppings or bedding get into it. Grit and calcium in two separate dishes give a better overview than a mix, because then you can see what the chickens really go for.
Points to note
If shells stay thin while layers feed and calcium are available, something else may be going on, such as age, stress or a health problem. In that case, consult a vet. Chicken grit is coarser than grit for small pigeons or canaries; choose a product intended for poultry. Back to all feed types: chicken feed and treats.
Frequently asked questions
Is grit the same as oyster shell?
No. Grit is insoluble stone that helps grind feed; oyster shell dissolves and supplies calcium for the eggshell.
Do chickens on layers feed still need oyster shell?
Layers feed already contains extra calcium. A separate dish of oyster shell is a reserve for hens that need more.
Why are my chickens' eggshells soft?
Often there is too little calcium available, but age, heat or illness also play a part. If it persists, ask a vet for advice.