Kuby's in Dallas is who I'ved used for over 40 years.
From I-35 E @ Mockingbird, go west past Hwy 114 to the corner at the overhead RR crossing, Ambassador Row I think it is & turn right - the only way you can turn, go north about 2 blocks to the stop sign and turn left, go across the RR Tracks and the loading dock on the left side before the dead end right turn is Kuby's processing plant entrance. It is a blast to hang around on and see whole Elk, all kinds of exotics, feral hogs...and even saw a full grown Buffalo one time get unloaded. They are one of the few DFW area processors licensed to process both Wild Hog and Wild game animals that I know of.
They also process all the food for their HIghland Park Snider Plaza retail store and ship Customer Orders for their national Print & Online Catalog store out of this buiding...and process K's of drive up drop off of all kinds of wild game too.
I started using Kuby's in the mid '70's when the warehoue was on Gaston Ave about 5-6 block west of Baylor Hospital...and think of them as the benchmark to judge other processor's by.
If you are coming south from western Oklahoma and can go thru Muenster on Hwy 82, Fischer's has been in the past a good place too, back behind the grocery store but it's been several years since I've been there and I heard some different reports on their loction and who's running the shop couple years ago when I was hunting in Young County and could come home to Lake Texoma thru Muenster..killer grocery store and all kinds of custom store brand goodies and a meat market that was a Fall & Spring Pilgramage from the lake.
Remember Aesops Fables of the "Scorpion & and the Frog's" crossing the river...
... we must hang together, or we will ALL hang seperately, Ben Franklin..
Those who fail to learn from History are doomed to repeat it,Santayana