I have read that scratch should not be fed during warmer weather as it raises the body temperature of the birds. Also, feeding too much grain can cause the birds to be overweight and not lay well. I'm new to the world of chickens, so I guess my first question is what, exactly, is scratch? I know it is a corn / seed mix fed to birds on the ground, but is there a specific formula? My next question is, can I feed wheat, buckwheat, sunflower seeds, etc. during warmer weather as a treat without risk of causing overheating? I have water and layer mash available 24 / 7 for my flock but want to provide some additional protein as well as provide them with a treat. Also, I feed about 3/4 of a cup of grain 3-4 days a week to 6 laying hens and a rooster.