When I was growing up in the country I raised Capons (Casturated Roosters). The same family whooped us every year at the county fair...so like a good country boy, I snuck out to the mans chicken coop and spied on his operation. He had a timer on his feeder and everytime it went off the feeder shook. The Capons came running and ate every time. His capons were at least double the size of everyone elses.

Would this work in a fish scenerio? What negative effects could this have on a fish population?

THX