The birds really love this feeder, and the squirrels have given up trying to attack it. Now the squirrels just wait on the ground and eat what the sloppy chickadees drop. I originally put in a mix with mostly millet, but the birds didn't come that often; I switched to sunflower and now the birds empty the feeder in one week. This feeder has no tray for dropped food, so I put a container on the ground to catch some of it. It would be nicer if there was a way to catch the food before it drops to the ground.