Hen pecked

You could separate her but not for long - trouble is if you keep her separated for too long she might have difficulty integrating back into the flock. In the mean time the cut needs to be sprayed with purple spray and you will need to keep an eye on it - if the cut does not heal you would need to take her to the vet.. Are you sure it was the cockerel that attacked her - if so and it is going to cause problems with your flock you might have to get rid if it.

If he is attacking hens you may need to cull him. However, young cockerels are inexperienced and can get their reason for being a bit wrong to start with!

It's only the one hen that he attacks . could it be that she used to rule the roost . ?

I'm no expert on cockerels but it sounds that way doesn't it - mine is just a little man with a big ego , but as I said he really means business when he goes for some of mine and I'm sure if I left him to it he would kill

I once caught him attacking one hen  in the hedgerow - she was bleeding all round her face . crest and feathers pulled out , I have never risked him with her again and she is petrified of him any way

he now has a separation pen where he can see but can't touch - the girls don't seem afraid of him that way