The problem with feeding nuts to dogs is that several of these can become toxic over time. This is due to the excessive phosphorous levels and other ingredients that may become even more toxic over time. These levels of toxicity can cause both kidney and bladder issues. In the most grim occurrences these levels can actually become fatal. It should also be kept in mind that some brands of chocolate also include nuts.
There is marvelous information for those of us that want to include peanut butter as an aid in administering medicine, rewarding our dogs with peanut butter dog biscuits or just sharing a bit on the tip of our finger. Peanuts are not really nuts! In fact, peanuts are really a species in the legume family (Fabaceae) to be specific. In other words, peanuts are really a type of bean!