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Well, to answer your question, Emma, not only have I dealt with a rare problem that cropped up in my lines in an extremely public and forthright way, and this is well known in the US, but I have also changed my thinking in the last decade about how tight I want my pedigrees to be on average. I feel that there are certain combinations of rather concentrated blood in several of the successful US show lines that appear to me to carry a higher risk of mitral valve murmurs in middle age, some of which progress to cardiac disease at ages younger than ten. I like a lot of these lines a bunch and have had great results with them in most regards, but I am now of the conclusion that in order to work those lines without an unacceptable incidence of mitral valve disease, I need periodic infusions of very outside blood.
I can't comment on what would work for UK breeders, but I can speak to what is going on here. The American Whippet Club is being proactive on the cardiac issue, and has long had tools in place to encourage all breeders of Whippets to have their eyes checked clear of hereditary eye problems.
Additionally, I am beginning to have my own stock more routinely checked for cardiac issues, I'm doing as much research as I can on lines that I might consider using, but the #1 thing I have been doing is attempting to open up my gene pool by the judicious use of domestic outcrosses as well as imported sires and dams without close relatives in my pedigrees already. It may be five to ten years before I will be able to say if my scheme is bearing fruit, but so far, my first generations bred under that scheme which are now nearing the age of 7 have not had mitral murmurs reported. That does not mean I only outcross; I do not. But I am doing more outcrossing than I was.
These things are talked about very openly and candidly in the US and I have no real understanding why they are such a hot potato on this board. Not everyone agrees that fixating on COI is useful, but neither is it controversial to discuss it as a potential tool.
I can't comment on what would work for UK breeders, but I can speak to what is going on here. The American Whippet Club is being proactive on the cardiac issue, and has long had tools in place to encourage all breeders of Whippets to have their eyes checked clear of hereditary eye problems.
Additionally, I am beginning to have my own stock more routinely checked for cardiac issues, I'm doing as much research as I can on lines that I might consider using, but the #1 thing I have been doing is attempting to open up my gene pool by the judicious use of domestic outcrosses as well as imported sires and dams without close relatives in my pedigrees already. It may be five to ten years before I will be able to say if my scheme is bearing fruit, but so far, my first generations bred under that scheme which are now nearing the age of 7 have not had mitral murmurs reported. That does not mean I only outcross; I do not. But I am doing more outcrossing than I was.
These things are talked about very openly and candidly in the US and I have no real understanding why they are such a hot potato on this board. Not everyone agrees that fixating on COI is useful, but neither is it controversial to discuss it as a potential tool.
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