We don't have the fire ant problem here we did in Florida, but once my husband treated the entire yard, then he would do a perimeter treatment about once a month. That really helped. He would just go around the border and put down ant poisen. We never have had trouble with the dogs getting into the stuff we bought for the fireants.
I did have my 3 year old daughter try to eat it one time though. I guess the dogs were smarter.
I'm just glad we don't have to deal with it here. Only the chipmunks are a nusiance here and they don't bite.