In article , snipped-for-privacy@email.com says... :) Hopefully they are not carpenter ants feeding on rotting wood in your walls. :) :) So - Take the advice of others, seal up everything. Put down boric acid and :) sugar mix (outside near your kitchen or possible entry points) to attract :) and kill them. and keep your kitchen clean and dry. You should be all set. :) :) Make your own ant killer cheaply - Borax cleaner and a bit of sugar does it. :) :) carpenter ants won't feed on the wood, they use damaged wood from termites and fungi rot or simple hollow areas to nest in...more of a nuisance than anything, especially since they are classified as a wood destroying insect.
Not all ants eat sugar based foods all the time, so it can be guess work guessing what proteins they may be attracted to.