N00b question but, is there a particular reason to avoid these lines?
(I was not keen on him being in any pedigrees I was looking into simply because he was in Penelope's but it's more my deep fear of another early cancer.)
My question to you would be, why would you identify him as the cause of the cancer?
As in humans, I would be incredibly reluctant to attribute any one "thing" as the cause of cancer. Even saying "cancer" is kind of a misnomer - there are many types of cancers - it's not one disease, it's many diseases. Osteosarcoma is one cancer. Hemangiosarcoma is another cancer. They are vastly different, don't respond in the same way to the same treatments. As someone who has had cancer (thyroid) that was highly treatable, and who has lost a sibling to a very aggressive cancer...they were incredibly different diseases. They weren't genetic, we didn't both get cancer because we were related, and it's unlikely we both got cancer due to the same environment, either. However, that said....factors for cancer all include things like diet, environment, genetics...even just simply a bad roll of the dice. It's so incredibly complex. Scientists studying humans know some things, but it's a big, complicated puzzle, and each cancer is different. Some certainly are genetic (certain breast cancers, for example), some definitely aren't. So, in dogs....it's complicated. Seeing a sire that is "popular" in a lot of pedigrees doesn't necessarily lead to the conclusion that a dog produces cancer, certainly not in the way that seeing a dog in pedigrees can lend itself to the idea that a dog might contribute to DCM. And even in the case of DCM, one has to remember that dogs have both sires and dams....
Just food for thought.
That doesn't mean I don't personally prefer to avoid a lot of "popular" sires, and strive for diversity where I can (but sometimes it's hard to avoid the older ones farther back).
Richter & Sypha
Glengate's Mountain Fortress CAA ORT L1E L1C NW2 L2V L2I ACT1 RATI SOG WAC
& Sirai's Golden Masquerade ORT L1V L1E L2C L2I NW2 NW3-C NW3-E RATI SOG DOG TKN SIN SEN WAC
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