Quote:
Chasing your hens away from the food is strictly a dominance thing. He should allow the hens to eat AFTER he is done. Once they are settled in, he will probably start behaving more gentlemanly and giving treats to HIS girls. As long as the hens do get enough food and there is no blood, there is no reason to intervene.
In general its a good idea to quarentine new comers for several weeks to protect your current flock. Pay special attention to signs of desease and/or parasites.