You can use frontline, but consuming eggs from the hens gets a bit hazy from a legality standpoint. I would feel safe eating them myself but any unlabeled use of a product on a laying hen means lawfully you cannot sell the eggs for consumption for 30 days which is why I do not use frontline.
Finally the cockeral. I have two of them that have very good frame size, but we will see how much meat they put on the bones. I haven't measured the cockerals height, but I will try to tonight.
I should also mention and apologize for the crest feathers being cut. I cut them during the winter...