hello, One of my Marek's survivor roos is presenting with blue comb and wattle. I have read other threads on this. I believe he is able to crow as I have heard him done so fine with blurring of the tips of the comb. As this has progressed he does not crow. He eats and drinks regularly. Have not seen his poop. He sleeps standing up and has more difficulty walking (more so than his residual gimp from Marek's). I believe his heart is failing and he is not oxygenating well. Thoughts? I am strongly contemplating culling him to ensure he does not suffer... any advice is appreciated.