Something you might not see everyday

Many wildlife biologists might not ever have a chance to see the transformation of deer coloration, but a beautiful deer in the summer changes over to, I guess, their winter camouflage in the winter. The deer's hair evolves into something, that at sporadic times of the late summer/early fall, looks to be poisoned at first...I knew they changed color but had never seen a deer in the process of changing to a dull gray until I purchased a trail camera. Check it out...she looks sick. But don't be afraid, this is natural for a deer to go through this.

The picture of the 10 point buck was taken around the same day..so you can see that bucks-- mature ones like this one, change their colors quicker. I think it might be because of increased testosterone.. Any wildlife biologists who know the answer, please advise. :)