Crowing at 10 weeks?!

[ace6175]

Yesterday, 2 of my supposed pullets crowed! (One was suspected to be a rooster) They are only 10 weeks old! Is this a normal age for this to happen? Is it possible that 1 is still a hen?
Has anyone else had this happen when they were so young?

 

[verlaj]

I have some that started crowing at 5 weeks. Every one of mine that crowed was a rooster!

 

[lux_interior]

I have a brown leghorn rooster who started crowing at 5 weeks, and he has crowed all day long, every day since then.

 

[ace6175]

Darn! I can't have 2 roosters.... at least 1 will have to go.

 

[speckledhen]

They can crow in the first week of life, believe it or not. I've had it happen three or four times, once at five days old.