All documented outbreaks of EHD have occurred during late summer and early fall (August-October) and have ceased within two weeks of the onset of frost, which kills the midge.
Experimentally, the disease can be transmitted to susceptible deer by the inoculation of virus-laden material from infected deer by subcutaneous, intramuscular, intravenous or oral routes.
Hemorrhage and lack of oxygen in the blood results in a blue appearance of the oral mucosa, hence the name 'bluetongue'.
check and see if his tongue or mouth has a blue appearance would be the first sign. I wouldn't think so this late into fall. I know back in Mid-Late October we had a frost in my area, and according to this, the midge (which bites the deer and transmits the virus if it carries it) should have already been killed off. a broken and swollen back hoof seems more likely he was hit by a vehicle, and lived long enough to run off to find a place to recover or die. No blood may mean internal organ damage and internal bleeding. If it's been there a while the body may be skinny as it starts the decomposition phase.