We are limited at our house in what we can use indoors due to asthma. So what we do is watch where the ants are coming from. If you can track down their entry/exit point, you can seal up that spot. I asked a pest guy once and he told me that was the most important thing. We had a problem where they would come in around a light switch or behind the stove where there was no baseboard. There was a product with no odor that we found at Lowe's that comes in a syringe. It is made for squirting the product into cracks and crevices. Also, have had them come in above the doors. We sealed those areas with caulk. Have also used Borax in cracks when I didn't have the syringe of stuff available. Did not have to put anything around where the dogs' dishes were because that is not where the ants were coming from. Also, we don't leave food out, so as not to attract the ants. And if you can spray with something around the exterior of the house that would help or use. You could also use Food Grade Diatomacious Earth (not sure about the spelling).
Food Grade Diatomacious Earth (often referred to as "DE") is an off white talc-like powder that is the fossilized remains of marine phytoplankton. When sprinkled on a bug that has an exoskeleton (such as bed bugs, ants or fleas) it gets caught between their little exoskeleton joints. As they move, the diatomaceous earth acts like razor blades. But it isn't supposed to hurt animals. We can eat it. We do eat it! It's in lots of grain based foods because lots of grains are stored with diatomaceous earth to keep the bugs from eating the grain!
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