The company I grow for grows a big bird. 9 or 10 pounds. We keep them around 58 days. The out time in between flock can be anywhere from 7 to 21 days just depending on the time of year. Generally get 4 flocks a year. Sometimes 5. But during the out time you have to get the litter ready. Blow everything out, clean everything and fix things that broke so it usually doesn’t leave a whole lot of time off. Of course you can pay people to do some of those things if you want to go somewhere but that cuts into your profit