How long do they need grit?

[chickens really]

must mean this kind of grit, which is mostly oyster shell

No you actually buy Chicken Grit at the livestock stores......Not House bird Grit...

 

[casportpony]

must mean this kind of grit, which is mostly oyster shell

I think I remember seeing an oyster shell that looked just like grit, which confused me.

For those that want to offer grit, offer non-soluble grit of the right size for the bird you are feeding it to:

 

[chickens really]

Oyster shell is just that...Oyster shell ground up a bit...

 

[Jpat]

No you actually buy Chicken Grit at the livestock stores......Not House bird Grit...

I meant the op must be using something like that

Petsmart told me it was just grit till i read thr box. dumb me

 

[Soon2BChixMom]

I leave grit out just in case they can't get enough from the soil. I noticed that the soil in their run is compacted right now due to all of the rain.
They should have access to grit if they get extra treats other than commercial feed.
I use these little dishes from tractor supply that hook onto their run or I used a zip tie to secure one for the chickens. The dishes were only available during chick days I guess because I don't see them in the store or on the website. I added the last detail since the dishes don't take up much room - plus it isn't going to hurt to offer the grit separately. They will use it if needed.

Found them:
https://happyhentreats.com/products/coop-cups

 

[Miss Lydia]

I keep grit out all year long it's not expensive and that way if any need some they always have it.