Here are examples of two different style timed protein feeders with mature bucks feeding in the daylight on a very large South Texas ranch. One is a tube style feeder that feeds x amount of feed at specified times. It can feed 50 lbs or more at desired times, which are many. The others is a timed trough feeder that is basically free choice when you set the open and close time(s) per day.
Outback Regulated tube trough feeder.
Preifert timed trough feeder.
Ibex feeding at a timed feeder in a breeding pen. MB Ranch King feeder.