I've thought long and hard about what dog may be trying to tell me with this visitation of gnats. And I think I've figured it out! Dog is trying to teach me what a huge cloud of gnats looks like. And dang if he hasn't succeeded in his efforts. I know just what a huge cloud of gnats looks like now.
That dog! You have to give him credit. In his omniscient way, he takes time out of his busy schedule to teach us great things.