From what I've read, it's salmon that is not good for dogs.  Tuna is not raw in the can. LOL  I wouldn't give to my dog all the time, but if they had a few bites I'm sure it wouldn't hurt them.  Here is a website with a list of what's bed for dog's,,,,,,,, 
http://mooreshaven.com/pets/dogs/saf...foodslist.html