http://en.wikipedia.org/wiki/Gray_fox

I think its this guy, based on their habitats....the red generally doesn't range this far into Texas according to Wiki. Maybe a Swift but.....thinkin a gray.

Looking at it, its the same animal my daughter and I saw on a scouting trip prior to the season. We were walking up to the blind and it shot across the road in front of us.

Anyhow, fun stuff. There's so much more to hunting than shooting deer.