[kach22i]

https://www.selfsufficientculture.com/threads/chicken-evolution.1419/


https://www.deviantart.com/qbliviens/art/Chicken-evolution-781640482


https://www.vox.com/xpress/2014/10/2/6875031/chickens-breeding-farming-boilers-giant

The left-hand chicken is a breed from 1957. The middle chicken is a breed from 1978. The right-hand one is a breed from 2005. They were all raised in the same manner for this paper and were photographed at the same age. Vox added the dates to this image. (Zuidhof, MJ, et al. 2014 Poultry Science 93 :1–13)