The only problem with keeping the two together would be if the entrance to hive is low to the ground. Chickens pecking entrance and getting stung on the face you'd want to avoid. Problems like bees covering feed in fall will happen if the hives are 300 yards away. New beekeepers constantly ask where the "pollen" is coming from when there is a drought or winter dearth? Animal feed and bird feeders is the answer. Other problem might be if you clip queen wings and the colony swarms they'll end up on the ground in front of the hive, could lose them to the chickens eating them. Bees don't sting when swarming.