The hind of the moose was also covered with flies.
Observation by Mike Brubaker:
Driving up to Nancy Lake on Friday evening and saw this moose grazing on the road side. Noticed the lesions on the left rear leg and all the flies probably making this poor cow miserable. Not sure of the cause of that kind of a lesion so I took the photos attached.
This observation send to ADFG Veterinarian for a consult.
Observation by Kimberlee Beckmen:
This is a fairly common situation with moose. See the image with description of "hock sores" from moose flies.