Earlier this spring I noticed some carpenter ants coming in one of our bedroom windows. I tried DE and eventually resorted to spraying with Ortho Home Defense to keep them out of the house. I have not seen anymore in the house since then. Now, the pool is up and in full use for the summer. Whenever we are out there in it or even when I am cleaning it, carpenter ants are falling on us from the tree limb above. This tree also happens to be right beside my coop and run. The tree was struck by lightening a few years back and the top was knocked out of it. It is a cypress tree and I hate it anyway (it has no business in North Texas where we are dry as a bone all summer) and I hope against hope every year the darn thing will die only to see it come back to life. This year along with the ants, I have seen a woodpecker at the top where the lightening had got it. I had hoped the two pests working together would do the thing in and did not consider it a problem until now. Last night, DH was on our roof trying to catch a feral kitten who made it's home under the eave of the house where the greenhouse connects to the outside wall. While up there he said there were tons of carpenter ants on our roof as well as a tree next to the house- not the cursed cypress but a nice oak. So now I'm thinking we may have to get an exterminator. What- if anything- can they use to safely get rid of the ants and not harm the chickens and or the bugs that buzz my garden and the fish in our backyard pond which sets under yet another dastardly cypress? Unfortunately cutting the trees down is not an option. Even though I hate them, we don't own the house and the person who does doesn't want any trees cut down. Anyone have any ideas?