Yes it is abnormal for a rooster to do this. I don't agree with it being normal rooster/cockerel-hen dominance thing, a good rooster will stop attacking as soon as an older previously dominant hen submits to him... a good rooster will keep his eye on her but, be courting and wing dancing at her a lot but not bloodying like this at all.
His behavior towards her is much more typical of a rooster fight, the winning rooster can be brutal on the losing rooster just like that. It may be he regards her as being another rooster that he has defeated and must drive out so he remains the boss rooster. If that's his behavioral mode, unfortunately it is Very Hard to deal with it if you have only one coop/run. Separation really is the only solution in close quarters.
I would recommend there be separation, probably best be him separated from the whole group so the hen/pullet all stay toghether so the ranking/order remains stable and re introduce the cockerel a month later. Two birds who have fought have fairly good memories which last for a while, so maybe what works is for him to either forget or mostly forget his fight with this hen and hopefully he will court them all as his new harem including this one hen- she may still be fearful of him and hopefully he will not read any of that as a threat to be put down.
if separating him from the flock, do NOT be tempted or feel sorry for him and move a pullet or more with him. If separated with him the pullets will become much more confident and start fights with the other hens once they are reunited. Possibly making the cockerel exhibit another behaviorual failure with the hens... most roosters don;t but its really odd he treated a hen this bad, so..
His behavior towards her is much more typical of a rooster fight, the winning rooster can be brutal on the losing rooster just like that. It may be he regards her as being another rooster that he has defeated and must drive out so he remains the boss rooster. If that's his behavioral mode, unfortunately it is Very Hard to deal with it if you have only one coop/run. Separation really is the only solution in close quarters.
I would recommend there be separation, probably best be him separated from the whole group so the hen/pullet all stay toghether so the ranking/order remains stable and re introduce the cockerel a month later. Two birds who have fought have fairly good memories which last for a while, so maybe what works is for him to either forget or mostly forget his fight with this hen and hopefully he will court them all as his new harem including this one hen- she may still be fearful of him and hopefully he will not read any of that as a threat to be put down.
if separating him from the flock, do NOT be tempted or feel sorry for him and move a pullet or more with him. If separated with him the pullets will become much more confident and start fights with the other hens once they are reunited. Possibly making the cockerel exhibit another behaviorual failure with the hens... most roosters don;t but its really odd he treated a hen this bad, so..
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