We are the proud parents of 3 fuzzy little boys: a 9.5 year old Sheltie and 2 Carolina dogs (www.carolinadogs.com), a 3.5 year old and a 9 month old puppy. Our Sheltie is rather large at 34 lbs (that is due to his height rather than fat old Sheltie syndrome). Our CDs are 55lbs and 40lbs. We have had them on Canidae but since they have changed their formula the boys don't seem to be handling the food too well. And we are not handling their new gas problem that well either .