The smell of my kids' poop changed depending on what I was eating more of. There was a 2 week period where DS2's poop smelled exactly like the popcorn butter they have at the movies. It was eerie.
If it's just the poop that stinks, and LO seems normal, I wouldn't worry about it.
Re: Dumb question round infinity
DS1 - 7/2011, DD 12/2012, DS2 - 4/2014, MMC - 12/2015