As you only have a few chooks, and will have to collect eggs each day, that feeder is probably overkill. We store our chook food in a plastic rubbishbin with metal clips that hold the lid on (keeps mice or anything else out). I fill an old dog food tin with feed and take this to the hanging chook feeder each day.

We had a water dish that had a house connecter and float and it would fill up when the water got low. Also had a hole for draining, which was handy for cleaning. Had to move it when we built our new chook house and it got broken, but that is what i want to get again.

Another thing chooks love is if you string up a lettuce or cabbage so it is floating in the air at pecking height.