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Anyone please help chime in here, but Wynette, if a LT Brahma would help the Col Rock, I cant help but believe a Dark Brahma would do the same for the SPRs. I think I would go thru the American Brahma club and find the best you can possibly get!
Just my opinion as I am certainly still learning myself
Yard full o' rocks before you start crossing or messing with those rocks talk to Gary Underwood or Shanon Higgins about the genetic ramifications. There is another guy henk69 on BYC from New Zealand that knows genetics.
I would call Tim Bowles he will remember the bird and conversation as you are well aware they aren't common.
It could ruin your line or set you back about 10 years. I would bet money that it is the under color that was in question it should be a fairly dark slate grayish color if you do not watch it has a tendancy to lighten. Is white dominant in a rock? Columbian [attern is one of the least understood. Be patient you can get the dark under color through selection. Hatch a lot of birds and cull.
My buddy was told the same thing about using a LT Brahma.
My buddy has Columbian Wyandottes here is a question posed to Shanon in November 2010.
Question... If you wanted to ad size to columbian wyandottes using light brahmas would you put a wyandotte cock on light hens, a light cock on wyandotte hens or both? What would you do the next generation? I have a friend with the wyadottes, guess who has the lights. Any guesstimates in a time frame on comb and feather foot differances to disappear with severe culling at work?
Later Charlie
Here is the reply from Shanon on crossing a LT Brahma on a Columbian Wyandotte
This is a much more tricky thing to do than changing color. Neither comb or foot feather traits in these birds are sex linked, and since you are not changing color it wont matter how you cross them. But, both the feathering and the pea comb are incomplete dominates meaning that it will be hard to determine genotype on a lot of the birds based on phenotype. This will muddy up your culling when the gene frequencies get low for both traits, and could result in persistent problems with leg stubs and random pea combs popping up in later breedings. The pea comb hides very easily behind apparent single combs making it much easier to cull single combs than pea combs. You may be bitting off more than you can chew with this one, and may never get a completely clean wyandotte flock again. It may be time better spent to keep selecting for larger birds in your wyandotte flock, or crossing to a clean legged, single comb breed that is larger like rocks or sussex. Even if they are not the same color as your wyandottes it will be much easier to get them breeding true again. Sorry for the not so great news on that question. Keep me posted on how things are going.
Shannon
Good luck with the birds
Charlie
Thanks for the advise Charlie!!
Gonna stick with what I have, raise 75-100 chicks from the Canadian trio I have and keep only the best 5-10 in the bunch.
I think these guys give me a good start
I have "culled" everything from the Ohio strain (the birds that Tim judged) except for 2 pullets that I will save for a little genetic diversity...plus one girl has EXCEPTIONAL undercolor
First hatch is due tomorrow....1 of 3 has already pipped. 10 more set, 2 weeks behind these and I'm putting more in tomorrow
Just gotta finish downsizing some of the misc birds I have to insure I have room for everything....I am going to raise Col Rocks and CRs only, at least for now