Will a rooster try to mate with pulletts

[luckychickens15]

Well one mature rooster and 2 baby chicks soon to be roosters

 

[NewJourney]

I just witnessed my year-old rooster mate with one of our pullets. She’s 11 weeks old. We are worried because he is a barred rock and she’s so small compared to him. We had never seen that behavior toward our pullets until now. We have two other pullets and a cockerel in with our adults.