If you ever have free time go to google books & search poultry. There is a treasure trove of old poultry publications, some as early as 1854 & a lot from the 1900s-1920s that are really interesting! It is amazing all the feeds that are advertised & brooders & such. It must have been the first golden age of backyard chicken keeping. There was a lot of specialized advertising aimed at making hens lay more eggs. I find it very interesting.