Farmboy, you are from southern Ohio, correct?
If so, remember that there has been a lot of cases of EHD, epizootic hemorrhagic disease, being transmitted from deer to cattle. I know of numerous cases in both Pike and Highland counties. If you have had that many deer found dead on your property, you should contact your local extension agent to have him come ouot and take a look also. Be afraid of EHD as it hasn't ever transmitted to cattle before, and treatment options are not the greatest as of yet.
Hope that the freeze warning that is scheduled for tonight occurs, because that will eliminate a lot of the gnats that carry the disease from the infected deer into your cow herd.