The longtime UAS 'tiel breeder who finally persuaded me to use 5% Sevin dust told me breeders sprinkle it inside the nestbox with chicks in there. As long as you're careful to use only the 5% strength, I'm as certain as a human can be that your chicks will be safe. Not that I expect you to put it into the nest box. From my experience, you won't need to. Just a quarter teaspoon across each trail, close to the ants' entrance into the room, and they'll soon be gone. VERY soon
