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The group of SLB chicks that had the one VH chick were from hatched eggs that I purchased from someone here on BYC. I am only keeping 3 pullets of that group to add to my SLB roosters and hens from Dan's stock. I am hoping that by combining these and having roosters from different stock will reduce the risk of vulture hocks. If I find any evidence of VH in this Spring's hatchings, then I have a big problem. Correct approach?
To the best of my knowledge, all silver laced Brahmas in the U.S., including Dan's, originated from my stock, as well as his blue laced golds/reds. He has blended them with his own buff laced project birds since then.
Have you hatched any chicks out of the birds from Dan ? If so, any sign of VH?
If you have the room and multiple males, I believe I would keep the females seperate. Because you know the newcomers at least are suspects for potentally carrying a hidden single copy.
That's the difficult thing about breeding out a recessive like VH, single carriers look perfectly normal. Another option would be to test mate to a full blown VH. Any bird who produces any VH chicks out of this mating(should be 50% so won't require alot of chicks to tell) is carrying a single hidden copy and should not be used as a breeder.
If I had to do it over again, and had any inclination of such issues popping back up, I would have surely kept my birds here, till I had it worked out. Have not had any such problems with my blue laced red project birds, and have not mixed these lines for that very reason.
I knew that Dan's SLB originally came from your stock. And yes, the eggs came from Danny where I found only one VH. I do have both groups separate in case their are any carriers (they are a few months apart in age) and can keep them that way to find out if if any chicks are coming up with VH. I culled the VH cockerel as soon as I saw it at 3 weeks old, so I cannot test breed him to look for the gene. I have no intentions to mass produce these birds, just want to keep a nice small (4 hens/roo) correct flock. Thank you for your advice Gary.