Mona
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Ask your doctor if you can give him Blackstrap Cane Molasses.  It's a natural food and helps keep stools soft.  It is strong tasting, but works.  Also he must drink plenty of water.  Have you taken him to a gastroenterologist?  There could be a hidden problem.