That would certainly be an interesting project! I think Tom Writing did something sort of similar with " Whiting True Blues" to increase eggs laying. I read a fly tying article where the author was saying that these were a type of Genetic Hackle Fowl, but have since found articles that disagree with this statement, saying the " True Blues" are homozygous for blue eggs through the Ameraucana side of their heritage, and the Leghorn side is for superior egg production, but that these birds do not produce the cape\saddle dry fly strings like feathers.Aww, what a shame about your boy getting hurt.
I think that degree of aggression by the hens would be a disqualifying trait for me.
But then, my goals are slightly different... instead of the most maximized feathers for fly tying (I don't even fish) I'm fascinated by the quantity of lengthy feathers all over the bird and my goal is to continue those great genes while selecting for docility and egg laying. If they can't get along in a flock I wouldn't want to perpetuate them (unless they had such rare qualities it would be worth it to maintain a separate line).
I've been toying with the idea of starting a separate egg improvement pen with an extra male over some leghorn hens... then keep backcrossing to Hackles for as many generations as it takes to get the feathering back on track before blending it with my main Hackle pen. My concern of course is just how many generations will it take to get the proper feathers back. But I do think it's important to have really good laying (productive, even) for the continuation of the breed into the future.
There's also the option of merely selecting for good laying, but I wondered if that might take even longer than a cross?
You can only get Whiting True Blues thru Murray McMurray Hatchery, and they are supposed to breed true, unlike the Hoover Hatchery rendition of Whiting's work, called the Prairie Bluebells.
It would be fascinating to see if you could develop an egglayer with the feathering of GHF. I found this Darbee line to be extremely broody, they start setting at the drop of a hat ( or an egg!) whereas I did not see that in the Aston line. I am not sure if all strains of GHF are that broody ? Perhaps Mr. Heltzel would be able to provide more data on this? The breeder I bough t my birds from had all birds in separate cages; and hatched everything by incubator.