THEY WON'T EAT THEM?!?!?!?! My chickens go absolutely CRAZY for an ant hill!! But if your chickens won't eat them and they are too much of a problem, than I don't know what to tell you. I highly advise you NOT use ant killers in a chicken pen. Sorry.
ants are bothering my flock a bit too. i suggest moving the cage... if ants follow, move the cage one more time and get ant spray. make sure cage and birds are far away. i killed ants like that.. they go after chicken food they don't eat and red ants can and do bite the chickens.