is my chicken sick?

[kumokumo]

Your chickens need to be fed a diet suitable for chickens. They only refuse feed due to always getting fed "treats". A healthy flock starts with proper nutrition.

It sounds like you've got a lot going on with your flock.

I'd stick with the advice @Wyorp Rock has offered.

they eat more things than the stuff i listed. they also free range in my garden. i provide calcium and vitamin powder, they aren’t overweight and are very active. what else am i missing in their diet?