I've been giving peanut butter to dogs for many, many years and have had no problems at all with any type of allergies. I have been giving the all natural old fashion peanut butter for a few years now. No sugar in it either. I'm sure like most foods, there will be a few with an allergy to the peanut butter, but if you have not had any problems with it, I don't see not giving it once in awhile. I know a lot of dogs can't eat wheat or soy products, but there are many more dogs who have no problem with those. I think each dog should be given what works for him or her and is the very reason I strongly suggest giving your dog only one item at a time for three or four days (real food) to see if there will be an allergy. Simple.