Do dogs die after eating mushrooms?

It depends on the type of mushroom consumed. Some mushrooms, such as the Death Cap or Destroying Angel, are extremely poisonous and can cause fatal liver failure in dogs if ingested. Other types of mushrooms, such as the common mushroom or oyster mushroom, are considered non-toxic and are safe for dogs to eat in moderation. If you are unsure whether a mushroom is poisonous or not, it is best to avoid giving it to your dog altogether.