You are correct, to each his own,
one thing i noticed with this food, is my landseer are WHITE, as Bright white as can be, with NO brown staining Whatsoever, wich can happen due to dog food or water.
also, supplimenting is something i do becouse like i stated above, in my humble opinion, i would consider myself ignorant not to suppliment, especially with the cooking process these foods go thru and you dont get them fresh from the factory, unless you order from the wysong or other specialty dog food places.
so, with that, i will continue to HELP support the joints in young growing newfs, who go thru awkward growth stages, who over compensate when they are rear high, and need the support of GL and Chond.