Hi, how scary for you. I hope that all works out, and I would definitely try to get another opinion much sooner, rather than later. I do not try to know a lot about Danes, b/c this is our first one, but I have done tons of research in preparation for getting her. Maybe don't worry about this now, b/c you need to find out the problem with your baby first, but I would think about SWITCHING THE FOOD FOR SURE! I don't know much about the raw diet (but I've heard good things) , but I have heard not so great things about Science Diet. Actually, some pretty awful things. Whatever you choose to do, I would take him off of that food soon! There are many quality foods for Danes, we now feed Eagle Pack to our baby girl, but ask anyone on here and they'll give you recommendation
s for food. They helped us out. Or go to The Dane Lady's website- she specializes in giant breeds and has a whole list of brands that she recommends.
Also, I've always heard that you should feed an adult dog at least twice a day, especially when they are such large dogs. I would get another veterinary opinion, and possibly a new vet. Again, I am not trying to pretend that I know everything, or even very much, but I have really done research on foods, and what I mentioned above is important. Hope this helps at all, and I hope things are OK for you and your Dane.