I have to agree with Ken 100%. We have fire ants and our little Portuguese Podengo, Phoebe, got bit in between the pads on her foot. She was miserable. We tried both Amdro and Orthene. The Amdro mounds showed no effect for a week and the ones we treated seemed to just move over a bit and form another mound. The Orthene killed them right away with no sign of them and we don't use anything else now. We treat the front, then the back, so we can walk Phoebe in one or the other at a time.