Wierd post but my 1 year olds poop is smelling really odd like it smells like cold or when you get…

Wierd post but my 1 year olds poop is smelling really odd like it smells like cold or when you get sick that type of smell he doesn't have a fever or anything no symptoms of nothing its just his poop and I'm really not sure if I should be concerned or not its been going on for about a week or so any one else experience this and or what should I do ??