I treated my hive with formic pro yesterday afternoon. Last evening I got a text message from my neighbor, he had alot of my bees on his back porch and driveway. Some were fine, some were dying. It was also dark out, the bees should not even have been out. Is this a problem with formic pro, does it cause bees to leave the hive? They have never done this before and I don't think he likes them all over his backyard.