I have a 5 month old son who s stools have started smelling like ammonia. They are dry and the consistency of play-doh. They are very dark green. He urinates well, and eats well and often. I have started him on rice cereal with no problems. I introduced applesauce, bananas, green beans, all with no problems. He has had sweet potatoes once over a week ago, no problem. He has been eating pears while having the smelly stools, could this be the problem ? What else could be causing the ammonia smell ?