I started using this product after my 18yo Welsh Sec D lost weight in spring, and didn't shed his winter coat as usual. PPID tests showed there was nothing there, but his droppings were also a little loose. By introducing BioPro gradually, until we reached the stage where his droppings were consistently normal, and not separating him and his Dartmoor Hill Pony companion during summer, he regained weight and his droppings have been normal, on less than the recommended daily dose, ever since.