I just moved to a new home, there was a tree once where this nest is. There is a hole and 2 smaller holes. They are deep. There are numerous yellow jackets going in and out of the large hole, they are aggressive and I want to keep my pets safe. I have covered the holes but am afraid of using gas or any substance that might hurt both the lawn and the animals. I know there are several remedies out there, just wanted to get an opinion of what the safest thing to do would be. Thanks!