Are we talking full size hens? You can use almost anything....I have 13 chickens, and I use a 5 gallon bucket...I made a hanging feeder...cut some holes along the bottom of the bucket, and took a large eyebolt made a hole in the bottom of the bucket, and secured it to a large round plastic pan....about an inch deep. Made a hole in the lid....ran a rope through the lid, to the eye bolt, and hang it from the ceiling. Fill it....ohhhhh, once a week! Of course, for a smaller amount of hens, you can use a smaller bucket...like the easter egg buckets....but will need a lid to keep them out of the top! However, you can get a long feeder at most any feed store. Depends on how much room you have.