If your distribution roller is not extracting food properly, you may need to replace it with this new roller. The life of the roller depends on the food you use. Easy to snap in. The roller comes with the large gear. All you will need to do is remove the bottom of the feeder--comes with instructions.
NOTE: A "textual" description for installing certain parts is supplied with each order, but customers do not always read the follow-up emails/links to an excellent video for taking the feeder apart and replacing those parts.