My latest batch (a Belgian tripel) is now 2 weeks into primary fermentation and i was thinking of splitting the batch into 2 secondaries and loading one with some Brett. In lieu of ordering actual Brett yeast online can I use the dregs of a few beers such as Orval? I've heard about doing this but have never actually tried. What would be a reasonable amount of bottle dregs (# of bottles) to pitch? It's only going to be for about 2 gallons of beer for this small experimental batch. I know it will take at least six months or more but I'm a fan of Orval so thought it will be well worth the wait. Any thoughts?