About 10 years ago we converted part of the barn into poultry housing. The barn no floor and is on sand. One stall is the hen house and the next is the brooder house. The brooder house was unused for about four months between hatchlings. Now we are ready to put the pullets in the brooder house but have found black ants with a huge nest. The ants are going under the wall into the hen house and picking up the food the chickens spill on the floor to take back to their nest. We thought it would be enough to simply open up the brooder house to allow the older Australorp pullets to go in and eat the ants. This has been some what effective because they are severely decreased in numbers showing up top. However every night the ants empty the sand out of their nest. While there are fewer each day, it is taking a long time. We need to put the month old birds (15 chickens, 4 ducks, and 24 guinea) in the brooder house ASAP. When we do that we will have to close the door between them and the older birds. We worry that the ants will refortify their numbers and attack the baby birds. The ant nest is in the middle of the brooder house so we can't really keep the birds out of it. What should we do? Thank you!