There four categories for toxic mushroom types. These are categories A, B, C, and D. While these particular mushrooms are toxic to dogs, pets, canine and humans, they are divided into several types depending on how they poison the body. Here is a list of poisonous mushroom types that you should avoid:
Each of these mushrooms has a different effect on canines, but regardless of what kind of effect they do to a dog each one of these mushrooms can prove fatal to a dog eventually.