50% baking soda
50% powdered sugar
Mix it up, leave it by the ants. They're attracted to the sugar, bring it back to the colony where they all eat it and the baking soda kills them. Gassed to death, in a way
Not quick, takes 2-3 weeks, but pet safe and has worked for me. Well, pet safe in terms of no harsh chemicals.... might want to check with your vet in case your dog goes Tony Montana on the mix
