Quote:
Originally Posted by yorkietalkjilly  Probably the odor is from the amount of bacteria in the GI tract and poop of the one with the smelliest. |
This ^^^. Plus, the smellier poop may contain larger amounts of undigested food (fermented, stinkier). The one who has the smellier poo - did he ever have giardia or any tummy/GI sickness before? You may want to consider giving a probiotic if you suspect his GI's flora may be off.