Doria
Hi, Dr Will!
Reading Lynn's post brought another Allergy Culprit to mind--most "grocery store grade" commercial Pet Foods! They are chock full of dyes, preservatives, toxic chemicals and excitotoxins like MSG (by whatever name they call it!), that they can cause allergies by themselves, or exacerbate vaccine-induced allergies. Even if it weren't for all the toxins in them, most contain grain products, that dogs and especially cats, are just not designed to digest. They would need either multiple-compartment stomachs, like ruminants, or impossibly long, convoluted intestines, like horses, and a whole different set of digestive enzymes to boot, in order to digest those grains. So the incompletely digested grain proteins can penetrate the villi of their carnivores' intestines, get into the bloodstream, and cause all kinds of allergic havoc! I favor grain-free foods myself...wish I could afford raw!