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That would be the purpose of crossing lines. Chickens have thousands of more genetic variations than humans, dogs or horses, so we have to get that out of our head. You can take two trio's of birds and not run out of genetics in your whole lifetime. If you want hybrid vigor, try to find that vigor in your breed, cross with that line to get the vigor. Or, try to find a strain in your breed that is genetically different from yours - meaning didn't come from the same parent flock or if it did, has been crossed out to other genetics or at least has been breed separately from your bird's flock of origin for a few generations.
"Mutt" chickens do have a purpose for commercial production, backyard fanciers that want certain colors, egg colors, the commercial productivity etc., or to those looking to develop new breeds. They have no place, really, in heritage poultry discussion unless you're outcrossing to bring in a specific trait that your breed has lost over the years. I have been told time and time again and I wholeheartedly agree that these outcrosses should only be done by master breeders with the time and space to do many test hatches (meaning chicks you know you won't be keeping) of close relatives to check for recessive traits leaking through from the outside breed that are undesirable. You also need the experience to cull heavily and the eye for your breed that you know what you're looking for in these outcrosses.
Even then, it can be risky. Look up white Dominiques for instance. That cross was done by an experienced breeder, then passed down to Mr Fields who wrote the book on Dominiques, literally, and even then it took seven years for Mr Fields to realize the white was still in there!
Or even better, look at the million "Dominique" chickens that are Dom/barred rock/wyandotte/RIR crosses. They don't represent any breed well. Slap a rose comb on it's a poor Dominique, slap a single comb on it's a poor Barred Rock. But, it is what had to be done to bring the breed's genetic base back up. Unfortunately commercial egg sellers and irresponsible breeders kept doing it without discression and ruined the breed. Every older breed has a story similar to this one, I think.
Speaking from the little experience I've had - it has all been a failure!
I just hope others (and myself!) learn from my mistakes and keep moving forward. Listen to the nagging folks on here that tell you to go slow, buy quality, start small and cull vigorously!!!
That would be the purpose of crossing lines. Chickens have thousands of more genetic variations than humans, dogs or horses, so we have to get that out of our head. You can take two trio's of birds and not run out of genetics in your whole lifetime. If you want hybrid vigor, try to find that vigor in your breed, cross with that line to get the vigor. Or, try to find a strain in your breed that is genetically different from yours - meaning didn't come from the same parent flock or if it did, has been crossed out to other genetics or at least has been breed separately from your bird's flock of origin for a few generations.
"Mutt" chickens do have a purpose for commercial production, backyard fanciers that want certain colors, egg colors, the commercial productivity etc., or to those looking to develop new breeds. They have no place, really, in heritage poultry discussion unless you're outcrossing to bring in a specific trait that your breed has lost over the years. I have been told time and time again and I wholeheartedly agree that these outcrosses should only be done by master breeders with the time and space to do many test hatches (meaning chicks you know you won't be keeping) of close relatives to check for recessive traits leaking through from the outside breed that are undesirable. You also need the experience to cull heavily and the eye for your breed that you know what you're looking for in these outcrosses.
Even then, it can be risky. Look up white Dominiques for instance. That cross was done by an experienced breeder, then passed down to Mr Fields who wrote the book on Dominiques, literally, and even then it took seven years for Mr Fields to realize the white was still in there!
Or even better, look at the million "Dominique" chickens that are Dom/barred rock/wyandotte/RIR crosses. They don't represent any breed well. Slap a rose comb on it's a poor Dominique, slap a single comb on it's a poor Barred Rock. But, it is what had to be done to bring the breed's genetic base back up. Unfortunately commercial egg sellers and irresponsible breeders kept doing it without discression and ruined the breed. Every older breed has a story similar to this one, I think.
Speaking from the little experience I've had - it has all been a failure!