I have a batch of guinea keets that were all hatched about same time October 1. All the guineas have doubled in size except for one. He is about the same size as the day hatched. He had pasty butt and I have been cleaning him and treating them all for coccidiosis in their drinking water. Prior to this I lost 3 keets. Does anyone have ideas why he is not growing like the rest. Also all are on feed that is 24 percent. I am raising them with silkie chicks.