I generally don't feed patties. I open feed some pollen. When I DID feed patties to the TTBH, it has, as Bjorn's does also, a 3/8" gap between the top of the top bars and the cover. I just made a 1/4" gap between two bars in the center of the cluster and laid the patty on top of that. They consumed it about the same as any other hive did.