Hello i don give protein mix to my chickens cause it is full of chemicals, I have in the feeder corn but they don't really like it, every morning i give them scrap bread with olive oil i also add garlic to the water witch i change daily, there free to pasture to eat watt they want, when i close the cup i give them chopped grass, they do eat a lot of warms and bugs for protein. There is a medicine that if you give it to theme they will lay like crazy and probably die by exhaustion, stress, that medicine they give it to battery hens even if those hens can lay almost every day. Also if you decide to give proteins to your birds you should know that they will get fat and when they are fat they stop laying and have problems in the summer. Keep your coop clean and provide them with fresh grass every day avoid drafts in the coop and be sure that your birds are calm and have a routine.