So I changed my cat's diet a few months ago to dry Natural Balance low calorie food because I heard they poop less on better food plus my cat is a little overweight. However, my cat seems to poop all the time! At least three times a day, maybe more. His poop is always pretty soft and wet (he doesn't cover it), and it really smells bad! Sorry to be graphic. Do you think this is normal or should I switch his food?