When the recall first happened, when no one had any idea what was going on, we asked a local vet what she thought could be causing the illness and deaths, and she said she believed it could be an excess of Vit D. This was before anyone knew anything about the wheat gluten being contaminated. I guess the symptoms the animals were exhibiting were consistent with Vitamin D toxicity, at least according to that vet. I also read that a lawyer who is representing pet owners in the Royal Canin lawsuit had urged the FDA to have the Vit D levels checked in the Menu foods, because he said the symptoms the animals experienced were so similar to the ones his clients' pets experienced. Who knows?
Nothing would surprise me at this point.