I have a barleywine that I'm getting ready to bottle and it's been in secondary since January at this point. I know for certain that I am going to be re-pitching more yeast before I bottle it. I've seen people saying that you don't need to re-pitch with the same yeast strain you brewed with, and that a re-hydrated, highly-flocculant neutral dry yeast will suffice. My question is, how do I know that this new dry yeast I'm introducing won't eat sugars still present in my beer that were indigestible to the primary yeast strain I used? I don't want over-carbonation, or bottle-bombs. Any help would be appreciated.