Here, I get a 2 kg bag of full fat soy meal and add it to a regular bag of chicken feed when anyone is molting. By the end of the week, feathers are starting to fill in and everybody is looking glossy again. Works every time.
So do I!! My lot love blueberries. A number of times I've nearly tripped over several girls in the kitchen who know there are blueberries in the fridge. I use a lovely bag of yummy scraps to lure them back into the coop. They love dry rolled oats BTW. And I have a call I only use when I want...