If you're taking your dog on regular 8- to 10-mile runs in the summertime, there are other things you should be more concerned about than footwear even if you no longer live in Texas (assuming you ever did -- I'm going by your handle).
A lot of dogs will gladly overheat without letting you know it, because most of them they like to please their people. So it's a good idea to avoid the sun, find places along the way where she can jump into a river or pond, and encourage her to pre-hydrate by tainting her water with a bit of something sweet so that she drinks more than she normally would before you head out. You say you run on roads and sidewalks, but if there's any way you can head for softer surfaces for at least half of your runs with your dog, you'll be doing a total of about twelve major joints a big favor.
I don't think you need the booties if you've already worked her up to longer runs without them -- the calluses dogs develop are pretty thick, and what you perceive as "worn down" is probably benign. I used to routinely take my yellow Lab on runs longer than 10 miles and I never noticed any problems with his feet (although again, we were on trails for at least 75 percent of his weekly mileage, which was often at least 40 a week).
It's helpful to do some running on pavement so that you don't have to trim her nails, which isn't nearly as traumatic as it looks, but still sucks.