Charlie behaviour

[benjaminzygs]

It's natural for a rooster to be aggressive to a predator.

Is he aggressive towards humans or other chickens?

He is aggressive to my dog

 

[benjaminzygs]

What kind of dog is Millie?
Best bet might be to keep dog and chickens separate.

Border collie

 

[benjaminzygs]

Is he aggressive to you or the hens?
How old is Charlie?

I know you a few month ago, you alway helped me out. Charlie is one year old.

 

[benjaminzygs]

I made a small video for you guys

 

[SBFChickenGirl]

Charlie is a handsome boy!

 

[DobieLover]

I made a small video for you guys

Well, from what little I could see of Millie's body posture looking at the flock, she appears to be a little intense. Perhaps Charlie is interpreting that as a threat to his flock.
I would just keep Millie away from the flock so they can't interact.

 

[benjaminzygs]

I appreciated it

 

[benjaminzygs]

Updated we upgraded to steel fencing and we separated them.

 

[TheOddOneOut]

Yes, she seems quite interested in the flock.