I have a wether that might need one of those 'diva' pens. He usually is in with just the buck, but since the buck is currently out with the rest of the herd for breeding (plus the buck pen is flooded right now due to this never-ending rain), the wether is out there too. When I feed everybody he acts like he is starving and tries to hoard as much feed as he can.
Probably a good thing that they are about to be separated again before he eats his way to a case of UC.
In the future I have decided that he will have to be given a special pen with the buck is in with the girls...probably safer for him that way.