Personally I never feed cooked meat for my lurchers at all so I would only advocate raw.
I can tell you what I feed although endurance in terms of length of run for say a fen dog, has never been a concern of mine. My dogs are out for long stretches with me so that's the only endurance I require.
I feed mostly whole chicken carcasses, lamb ribs, beef skirt, tripe, pigs heads and lamb spines. These are all supplemented with left overs from the butchers such as old cuts of steak, raw sausages, mince, trotters, pigs tails, ears etc etc and I don't pay a penny for it.
I think chicken ca