I have a horse who was nicely tucked up at the beginning of the summer through exercise and good feed, worming on schedule, etc. Half way through the summer he started to develop a pot belly and yet show ribs on his top side. I have eliminated salt from his diet, wormed him heavily, tried less hay and more grain, less hay and hay cubes, more hay and less grain, more exercise, beet pulp, putting him on grass and nothing else..... I am running out of ideas! Anyone have any suggestions?