Re: Tbh combine or winter in same hive?
The thing with these weak hives, is why are they weak? If they have a problem now at summers end when most hives are strong, it will possibly worsen through winter and the hive could be lost. Is there a way to test for varroa mites?
The ones that swarmed, could simply be that they sent out a prime swarm, and then more after swarms, which can leave the hive in dire circumstances. But has the new queen mated and started laying normally? If so, and all appears normal just short on bees, if all equipment is standard you can transfer some brood and bees from a strong hive to a weak one.
But the ones that are weak for no apparent reason, I would definately find some way to check varroa numbers.
44 years, been commercial, outfits up to 4000 hives, now 120 hives and 200 nucs as a hobby, selling bees. T (mostly).