Interesting feeding behavior,I hadn't heard of that before.The name scat, old genus Scatophagus, means dung eater.
They are know to follow water buffalo, and elephants in rivers and eat the dung as the mammals crap it out. Quite an amazing fish.
Did he have any luck?Be aware that a tank of scats means the tank will never contain plants. My scat shoal ate every live plant and tore apart every plastic plant. We had a member, years ago, that was trying to breed scats. He kept them in a green-water pond and fed them by throwing whole heads of cabbage into the pond which the scats made short work of the hard leaves.
Did he have any luck?