poop question

I was just wondering if any breastfed babies have stinky poops. I ask because my son always has really big poops and they have a smell. It is not terrible but definitely not pleasent. He is strickly breasfed.  I am concerned only because some people have said that breastfed babies poops don't smell.

I am concerned because I am a cystic fibrosis carrier and my son also carries the mutation. My husband does not have the cystic fibrosis gene but there is still a small chance that my son could have cf. We have to have a sweat test done to make sure he doesn't have it but right now he is too little to sweat. I have read that a symptom of cf is foul smelling stools (i thought all poop was pretty foul) but what do I know. I am just a nervous wreck because I won't know for a while.

Does anybody else's breastfed babies poop have a stink smell?