I was just going to point that out tooSome people eat quail. A large fowl cockerel will be bigger than that.

By the time someone is sure of gender, a Polish cockerel certainly should be bigger than a quail. When I look up Coturnix quail, I find a lot of sites that say the mature live weight is around 5 ounces. Of course some are bigger or smaller, but that's still awfully small compared to chickens.

Yes! Even a small bird would have giblets in addition to the meat, and the bones, skin, and feet (if desired) can be used to make amazing, nourishing bone broth. I only use an electric pressure cooker now to make bone broth (2 hour cook time) and store-bought doesn't even come close.
