Hi everyone. I'm new here and I have a question about my chickens. I have a 1 year old rooster and he keeps chasing my 4 month old silkies around and sticking his head underneath them. Can anyone tell me what's going on? Is he trying to breed, or hurt them?

and Welcome To BYC! Depending on your rooster and if the silkies are other cockerels or pullets, he may actually hurt them eventually, either fighting with the cockerels or trying to breed too young pullets/ or over breeding/ harassing them. Silkies are often picked on by other breeds anyhow, and you might want to prepare to keep them separate if the older roo does become more aggressive with them.