My birds are 1yr old mixed flock. Last month they stopped laying. And they are boney, fluffy but not much meat. They free range, so I expect some leanness but not this much. I started supplementing with layer feed at night. My chicks are given medicated feed exclusively until they are 2 months old. They show no signs of sickness other than being thin. Just did 1 round of worming 2 weeks ago, gonna worm again this week. Checked and no signs of mites. Dusted monthly with de. Coop spreyed every 2 weeks with undiluted acv. Waterers washed every time they are refilled, and acv added to drinking water.