My troop has had this "problem" for a while, too. It's not a problem, because it will take care of itself. We were doing "ad hoc" patrols at some adults suggestion some number of months ago. When the PLC was planning our last camping trip, one patrol of 9 had only 3 going. While some in the troop assumed they'd be combining with another patrol, they surprised everyone by going it alone. It worked out fine. Before I took over as SM, the troop would play fruit basket turnover every 6 months. There was NO patrol esprit de corps. None. I let them choose their last patrol, and they've stayed that way ever since. We run three patrols, and a NSP. I've decided that I'm going to keep them together, and they will join the oldest scout patrol, which in 6 months will be the smallest. And next year, the NSP will go the the next oldest patrol, and on and on. We may have a patrol of 14 for a while, but it's not something we can't deal with. It's better than halving a patrol of scouts that have been together since Tiger Cubs.