My 5 week old is both breast and formula fed. He had incredibly smelly wind and poos. It is so bad that I am having to bath him twice daily just to keep the smell manageable. I am assuming that it must be the formula that is causing this. I am using Nan HA Gold stage 1 as this is what was used and recommended when I was in hospital. Has anyone had a similar experience? Is there a better formula out there?