As someone who sprained ankles almost as often as the weather changed growing up (I have very weak ankles), I can tell you once you do it and are in the "recovery" mode, it is much easier to re injure it. I can't tell you how many times I rolled mine and was on my way to recovering only to do it again. You compensate to alleviate the pain and that often causes you to roll it again.
Frankly, I can't believe Dog made it back knowing what we do now. Rolling the same injured ankle the day before is bad enough, but rolling the other one in the game and STILL coming back? Dude is one tough nut!
Go ice them down, stay off of them and tape the crap out of them next Saturday. Should be good to go for the game, but he won't be 100% until a few weeks from now.