Greetings - first time post. I have 21 chickens, 5 of which are roosters (about 3 too many). I am grateful for all of the help and info I have received here. Thank you to all who participate. Question - how long on average should a 50lb bag of feed last for 21 chickens? I free range, feed leftover vegetables from the kitchen/garden, supplement with brewer's grain, and a little scratch now and then - all in an attempt to keep the cost of feed down. I can get a bag to last about three or four weeks. Not feeding enough? Thanks for your help.