I lost another chicken last night, she was perfectly fine yesterday but this morning she was dead. On close inspection through her feathers I saw mites. I am now in the process of obtaining treatment for the rest of them and cleaning their nesting boxes. On asking my vet if the mites would be causing the continual death of my chickens, they advised "no" unless you have a major, major infestation. Is this correct? Looks like Im back to square one again. I have now had 4 chickens die in the past 4 weeks, although this particular chicken may have been bitten by a snake. She was in good condition, a good weight and one of the stronger chickens but i would like advice from anyone about the mites please.