I know I can look it up but there is SO much info out there (some of it conflicting) I thought those of you with experience could probably explain it better. Do you have to give vitamin supplements if you feed raw? I have an 18-month old Wolfhound who's probably around 150lbs. Right now he's eating Diamond maintenance which I know isn't the greatest brand, but not the worst either. The average life-span of wolfies in the U.S. is around 6 yrs old... I really want him to live longer than that. Thanks!