I have a mixed flock, mostly orpingtons. My question is this. Since the fall I have lost all 3 of my colored egg layers. We had a 30 degree temp change overnight when I lost my easter egger. We culled my amerucana last month, she had one ailment after another. She had a respiratory issue that i don't think ever went away and then she slipped a tendon jumping from the roosting bar and we just couldn't fix it. This morning I went to the coop to find my olive egger pullet dead. She was fine last night when I locked everyone up. I will say that we have had insane weather here and she did get sluggish everytime there was a drastic cool down, but then would perk right back up. I bought the amerucana and olive egger in September along with a chocolate and a lavender orpington, both of whom have had no issues. My buff orpingtons that we bought in may have no issues. I guess my question is this.. are the others less likely to handle bad weather than my orpingtons?