I have/had 2 dogs on it, never dia., but that's my dogs, every dog can have certain sympton to something.
I am no expert on nutrition. Speak to Mordy.... Although, I did have GREAT reaction to Missing Link Plus, Vit. C, Omega 3 fish oil and a good dog kibble. My boxer (r.i.p.) while he was on (Missing Link) did so well. But, from what I read, Mordy is the one to speak about dog nutrition here. So, I would p.m. her and get her take on it, or post it here so we can all get the F.Y.I.
Amy