Brown rice

[Mom of Chickens]

I have 12, 10 week old chickens, can they have brown rice, cooked or uncooked. Also how much would I give them.
Thank you,

 

[ChickenCanoe]

All things in moderation.
Rice is about 8% protein so if you are feeding an 18% protein grower or 20% all flock feed, the more rice (or scratch grains/veggies) will affect the bird's overall protein intake. At 10 weeks, their amino acid requirements are still significant.
I doubt it matters whether cooked or raw. I'm assuming you are providing the appropriately sized grit for their age.

 

[BigBlueHen53]

If you are providing a nutritionally complete commercial feed, they don't need it. But you can toss a few tablespoons out as scratch, like you would corn.