My son is 3 month 25 days old. He passes stools once in 7-9 days. He becomes cranky 2-3 days before passing stools and also the gas he passes becomes smelly. He is on exclusive breast feeding. Stools are pasty in consistency and in very large amount. We massage his stomach and back twice daily. Please suggest a way so that he regularly passes stools and does not accumulate it in his bowels.