I am on my third Astrolorp who is dying with a bloody vent. Appears to have laid an egg this morning which had blood spots on it. The other two also had bloody vents and just grew lethargic and died. It has been extremely cold here (-30 at night) for the last two to three weeks but I have them in a house with a heat lamp and they seem to tolerate it okay. My other breeds seem to be fine. She is my last one and I am hopeful that it is breed related but I am wondering if anyone has any insight into what the problem is? Thanks.