Fire ants are incredibly hard to irradicate. One sting can kill chicks, quail, a few stings could kill an adult chicken. Not many chemicals are effective enough to destroy the entire colony. I had a LOT of trouble with a mound that was very close to the chicken coop. I tried everything aside from burning the mound. Once winter arrived, the mound went fairly dormant and I was able to dig the entire thing up. I don't recommend this on any warm day as you will be stung. If you are allergic, you could go into shock. A big piece of equipment like a tractor or backhoe could safely dig the mound up any time of year. Just be very careful!!