Hopefully nobody will mind but I am a dad who needs help. Little Dylan is 5 months old and has been exclusively breast fed, not by me, until 2 weeks ago when we started 1 bottle of SMA before bed. Only problem is, and I am sorry for this, his arse stinks as bad as a commited meat eater! Is this normal or could it be the type of formula we are using? Any thoughts would be greatly appreciated.