I have (had!) a lovely blue leghorn, only young - about 8 months old. Two weeks ago he got out of the run and two of our dogs attacked him. I thought he was dead, but turned out he was fine - apart from a few puncture wounds on him. He recovered well, started crowing again after a few days, but not as much as before. Eating and drinking fine. Then this morning, he walked out of the hen house making a very strange noise, not unlike a hen. His wattle and comb had lost their colour. He let me touch him, which was unusual as he would usually run off, but he didn't like it. 15 minutes later I found him dead. Is this a result of the attack two weeks ago or has he caught something else? I'm concerned for the rest of the hens?