I have a Blue Andalusian hen, named Stormy that has just reached laying age. She's always been flighty, hard to catch and not very friendly. Today Stormy layed her egg, left her nest, and then viciously attacked my Red Star, Honey, who was quietly nesting a few boxes away. She was pecking and scratching terribly and then began mating her like a rooster. Honey finally ran off to another nest but Stormy attacked her there also and she fled the coop. Stormy left the coop as well. After a minute or two, Honey went back in to a different nest and Stormy attacked her again. I intervened at that point by removing Stormy and guarding the coop till Honey was done. I don't understand it because Stormy is not broody and didn't want either of the nests, plus she had already layed her egg without ceremony. She doesn't set on the eggs. She just wouldn't let Honey into any of the nests. She does not bother Honey outside of the coop.