American Livestock Breeds Conservancy - has a ton of info on livestock breeds that are going extinct because they aren't mainstream eating breeds anymore.
Sure, we need to get rid of feed lots and not prod sick cows to get back on their feet while the USDA inspector watches. But it's the circle of life - as worn out as that phrase may be. I'll never feel guilty about being at the top of my particular food chain (no lions here in the city).
"Right is right, even if no one is doing it; wrong is wrong, even if everyone is doing it." - St. Augustine