Well he might get diarrhea because he's not used to it, but probably not based on the cut of meat it was, and it won't actually hurt him. I didn't gradually wean my dogs onto raw, I just gave them some meat. The only time one threw up was because ginger stole cracker's and ate too much because she's a pig. But she just threw up the extra and was fine. A couple of pounds for a shepherd though, isn't excessive, at least as far as I know. I wouldn't be concerned if my dog had done that even if they ate kibble. Mine go back and forth all the time from raw to kibble without a problem.

Of course not all raw meat is good for all dogs, etc., but as far as this one incident the dog should be fine. If a dog has pancreatic issues, etc. then you need to be careful with fat content but just in general with a healthy dog doing what he did really won't do anything.