I bought 50 X's in October. I have had none die until a couple weeks ago. They are dying like crazy. I've lost 10 total so far. The weird thing is at 10 weeks old they weigh about 2.5lbs. I've gone through 600lbs of food. It's always been the same no changes. All my poultry get the same food and all the rest are doing great. I ferment their feed and put acv in their water. They have always been in a broader, never around any other animals or chickens. A few that died had what looked like mold 1inch all the way around their vent and the one last night that died in my hands had 2 seizures in seconds of each other and had a couple drops of blood by her beak. Some are still not fully feathered and I have 2 that are the size of normal heritage breed chicks at 10 weeks. Did I get a bad batch? Please help!!