Quote Originally Posted by ebhappydc View Post
Could perhaps be concentrated pee from not taking in enough fluids at times, or if he drank a lot of juice. Some kids here smell like they're peeing apple juice in the morning after they've had lots of it at home for breakfast. Maybe he eats some sugary foods at home which can contribute to yeast overgrowth. I'm assuming he's not in cloth which can have an odour all on their own.
Yeah, it would smell like ammonia if it was a cloth diaper that was stinking.