Well, we broke down and got a proper feeder for the steer.
The way we have been feeding him is to just buy small bales of hay and break off 1 or 2 flakes, twice per day. The problem is, we have to walk into the catch pen to put it into the feeder I had made. He has been starting to get aggressive with Mrs Inor and I when we go in there. Maybe "aggressive" isn't the right word - he wants to play. But a 180 pound man or a 120 pound woman "playing" with a 700 pound steer is probably not a prudent decision. We can feed him his grain without going inside the fence.
Now, we can also buy the big bales of hay and save some money too.