[nathanvanfleet]

My dog's propensity for diarrhea makes me feel less inclined to state that she has any tolerance for it.

[zdragnar]

I've known dogs that have lived on very varied diets (including most human food sans poisons like grapes), and other dogs that had very strictly controlled diets because they were sensitive to pretty much anything and everything.

Many breeds of modern dogs are very far removed from the lifestyle and habits of their wild brethren.