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How to make an automatic chicken feeder 
Purchase a cheap large bin. 
Aim to pick up a big bin without wheels. Because the feed holes will be placed near the bottom, a wheeled bin might get in the way of the feed holes you'll want to make.

OPTIONS:
- Larger bins will be better for making the feeder. A gallon-sized bin fits best; larger bins will make it easier to hold food.
- Most feeders are sold with wheels on only some wheels. If yours doesn't have wheels, you'll need a jar with a handle on the left side that also contains wheels.
- Avoid buying a bin that you see will get stuck. If you can get one without wheels, then use a wheel to make it easier for you to dump your hay in the bin.
- A 30 gallon trash bin should be enough to hold 150 pounds of chicken feed. While you're at a hardware store, pick up six pipe elbows and six pipe end caps.
A 30 gallon trash bin should be enough to hold 150 pounds of chicken feed. While you're at a hardware store, pick up six pipe elbows and six pipe end caps.