I didn't know that. But I can tell you that my 18 year old Cocker ate the NB for well over a year with no ill effects at all.
Our Pug and Papillon love the stuff and switching to that food seems to have cleared up a number of problems our Pug was having.
Thanks,
L
Remember an 18 year old cocker probably didn’t have the same predilictions our younger cockers may have. A lot of breeds are suffering inherited miasms from poor breeding practices, over vaccination and poor diets... I think getting your dog to 18 was a huge accomplishment.