There is a good chance that your bees are kicking them out of the hive. Your flow has probably stopped or slowed down a lot. They cannot afford to feed drones when there is no nectar coming in. You are probably seeing drones that just recently hatched. Look closer, you will probably see drone larva.
Have you looked in your hive lately. This is a possible indicator that the hive is queen less or drone laying queen. Look at the the brood frames. If you see good brood pattern, the flow has probably stopped. If you see drone brood in worker size cells, you probably have a laying worker. If this is the case, you will also see multiple eggs attached to the sides of the cells.
This evening I saw several bees in my observation hive biting the legs and head area of a drone. He was doing everything he could to get away. First time i have seen this.
This hive looked like it was about to swarm last Friday but I removed 4 capped frames of honey and replaced them with foundation. Seems to have worked. Our flow is still on.