Any one have any idea what breed this rooster is? (Was sold to me as a pullet).

[DemeChick]

He’s not crowing but having very aggressive mating behavior today the older hens. The flock his age 18 weeks, aren’t laying yet.

 

[cherrynberry]

He’s not crowing but having very aggressive mating behavior today the older hens. The flock his age 18 weeks, aren’t laying yet.

New Hampshire Red cockerel

 

[Painted Calls]

NH or Production Red cockerel.

 

[JustBabyMargo]

I’m thinking maybe a Rhode Island Red cockerel?
Google Image-

 

[Frazzemrat1]

Production red cockerel.
If he's getting too aggressive you can remove him and keep him separate from the ladies until he calms down. He's in the super horny teenager stage.

 

[DemeChick]

Production red cockerel.
If he's getting too aggressive you can remove him and keep him separate from the ladies until he calms down. He's in the super horny teenager stage.

100% agree I’m thinking he may have to find a new home...

 

[DemeChick]

NH or Production Red cockerel.

I think I did buy a couple production red pullets.