I know that there's a lot of controversy regarding breeding dogs with ED, especially if it's only Grade I, even more so if it's unilateral.
I was perusing the OFA page, and they've got a Q&A section on elbows that's quite interesting. Among other things, I found this. What makes it of particular interest for me is that many of the adult imports to this country arrive with ED++ elbows, their breeding values for elbows are to high to use in Germany, so they come here. I still ask, if you're breeding for a working dog, why would you breed to a certifiably incorrect front??
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"Examination of the OFA database reveals the following mating probability results for 13,151 breeding pairs of dogs with known elbow status:
Normal Elbows x Normal Elbows = 12.2% offspring affected with ED
Normal Elbows x Dysplastic Elbows = 26.1% - 31.3% offspring affected with ED
Dysplastic Elbows x Dysplastic Elbows = 41.5% offspring affected with ED
In this very large breeding study (primarily Labrador Retrievers, Golden Retrievers, Rottweilers, and German Shepherd Dogs), the rate of ED more than doubled when one parent was affected, and more than tripled when both parents were affected. In any breed where the overall percentage of affected dogs is already lower than the percentage that can be expected when a dog affected with ED is bred to a normal dog (26.1% - 31.3%), one would find few circumstances in which progress can be made by breeding a dog affected with ED."
Source:
http://www.offa.org/edanswers.html
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Thought I'd open it up for discussion to see what people think. There are plenty more questions/answers listed at the above URL.