I have two TBH in a suburban backyard. They are about 10' apart. Both sets of bees were purchased and installed this spring. One is doing rather too well with the TBH full of comb and overrun by bees. The other seems to be fading in comparison. No new comb being made this month and the number of bees is about 1/4 of what we started with. The queen is still present.
Is is okay to lift a bar or two of bees from the full hive and put them in the less successful one?