i have one hive that started as a nuc last year. they've been gentle as can bee until about the time i hived a new package two weeks ago. this hive sits nearby. i haven't seen any evidence of robbing or fighting. the older hive has honey stores, the new package still has some dry sugar and a pollen patty inside. i used to be able to go right up to the entrance without incident, now i can't get within 30 feet without getting buzzed or stung. what gives ? at first i was thinking maybe the weather had been lousy for a while and they were just in a bad mood, but even on a sunny day the older hive is not foraging like they were last year. possibly the hive needs more nurse bees until their numbers increase ? maybe having more bees in the hive is making them cranky ? i did notice a lot of tiny little sugar ants on/in the hive. could this bee the cause of their aggression ? should i seperate the two hives even if it doesn't appear to be robbing ? i'm stumped. advice and/or suggestions greatly appreciated