At What Age Does a Chicken Reach it's Full Size?

Michael OShay

Crowing
5 Years
May 14, 2014
25,581
2,370
438
Montana
I lost a beautiful White Plymouth Rock who was big, so I bought 2 chicks. One is a White Rock and one turned out to be a Delaware. At 5 months my White rock is smaller than the Delaware. Maybe she is a slow grower. Are we looking at 8 months for a White Plymouth Rock to be full grown? Thank you.
Yes, she may gain more weight afterward, but at 8 months your White Rock should have reached her full frame size.
 

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