When is a rooster considered fully grown?

Just_Clucky84

Chirping
10 Years
Oct 5, 2009
60
3
96
Boston, MA
Hi,
I have a five month old EE cockerel and he is huge. I know that boys are called cockerels until they reach one year old. How long does it take for a rooster to become fully grown? Thanks
 

gryeyes

Covered in Pet Hair & Feathers
10 Years
Sep 22, 2009
15,506
432
358
My slice of heaven in Somerset, CA
They are sexually mature (able to fertilize eggs) long before they are a year old, but the convention IS to call 'em cockerels until they complete their first year of age. And then they often MATURE into their full glory, full weight, and most mature behavior at around the 2 year mark.

My EE Carl is a year old this month, but he's been fertilizing eggs since he was 5 months old. I still expect him to mellow out some more, and maybe get a little more bulk, as this second year progresses.
 

gritsar

Cows, Chooks & Impys - OH MY!
13 Years
Nov 9, 2007
28,906
345
661
SW Arkansas
I agree with gryeyes. Also, some of it depends on the breed. My LF brahma roo kept growing and maturing until he was nearly two years old.
 

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