Wow, you sure want him to heal up too fast but as everyone has already said in their replies the process takes some time and the more natural the better. Everyone's different, some people heal in a week and some take upto 2 yrs but mostly the bms reduce after 3-6 months . I am 9 months out and tripping 3-4 times in daytime and 2 trips at night. The loose motions seem hell lot during initial days make sure to use some anti rash cream , I personally use sudocream . Tell him to practise lots n lots of kegels to strengthen those bottom muscles. Some fiber supp. will help him alot to bulk up but it takes a little time for the body to adjust to use of a fibre supp. so he may have some gas and increased urge to go .