We have 'em big enough, but the feeder is about 8 feet in the air on a tripod. Unless we get them flying pigs(LOL!!!!), I'm gonna be stuck using the funnel.
We have pics of them standing on their hind legs shaking the legs of the feeder to make the corn drop, or they will run and hit the legs and ty to flip the feeder over. We had one they actually bent the legs on it trying to knock it over. On our new ones the barrel hangs by a winch so even if you shake the legs the corn will not fall.