I am no biologist but just from the numbers you gave I would say Dallas county was basically unchanged if you were to chart it out on an SPC chart but something was possibly causing a negative trend in Winston county. At which time I would use my resources to further investigate Winston county's deer herd and it's health instead of not knowing there may be a problem there until it was too late and would then have to take drastic measures to reverse..... with the data and a little more investigation I may find nothing or I may find I need to adjust something to stabilize or increase the deer population.
How do you know it's not just lower hunter participation? Licenses won't tell you where a person actually hunts.
That's were using my other resources will come in handy
What are your other resources?
Like I said I am not the biologist but I would look closely at all properties registered in our management program in that area, do localized deer censuses, survey local hunters and processors and ect.