Recently I discovered one of my yards had a hive with Foulbrood. I t had all the signs... roping sticky brood, pungent terrible smell, weak scattered laying pattern. I destroyed this colony and its woodwork in a burn pit. The other colony immediately adjacent didn't have any apparent AFB symptoms but I shook swarmed the colony into a new deep box with frames of starter strips and burned the frames from the original (don't like to mess around with foulbrood).
I'm hoping these bees will consume any spore laden honey in their stomachs as they build new comb.
My question is how long do I need to starve them to ensure complete consumption of any honey from their previous colony? I would like to feed syrup to help them build back up.