First I live in Texas so we don't have hard winters. I was is shorts today. Don't get jealous I have to try to keep the turkeys cool in 80 degree days and warm them in to 50s at night. (Turkeys will soon get a climate controlled house like the chickens) my chickens have 24 hr light and feed and a climate controlled coop. I add vitamin D and calcium to their water (and now trying ACV) we raise for exhibition. I would love to do FF but I don't have the time or desire to mix it myself. I only have 6 weeks to get them ready so we push as hard as possible. I don't lose too many to heart issues but I don't stress them at all after week 4. I do know people who have had heart failure as well as leg issues. I have alarms that go off every 6 hours to wake them up. I use show feed with the highest protein. We make sure we don't take on more than we have room for. I am so excited to get my new ones next week I will keep you posted