I tried Wellness Core before for my hedgehogs, but it was too high in protein and fat for them. I switched to Wellness Healthy Weight (hedgehogs need low fat, unlike ferrets). The shape of both kibbles is more like a little cylinder shape, not a ball. The hedgehogs have no problem with the size and the ferrets eat the kibble as an occasional treat (also no problems). The size of the kibble is comparable to Pretty Pets Natural Gold ferret food. PS - Natural Gold uses potato starch in their kibble. My vet feeds his ferrets Natural Gold, so I would assume potato is not a problem. <http://prettypets.com/product_info.php/cPath/32/products_id/70> Anne [Posted in FML 5765]