AWWW! I hate the sad German Shepherd face. My old girl is 13. I almost had a heart attack when I saw her sprawled on the patio today. She only fell down the last few steps, but she landed on her side and got up limping. Between her and my 85 year old mother, I'm just waiting for somebody to break a hip. Neither one listens to me. Fortunately, they are both fine as of tonight.
Give Blitz a big kiss from us. Spoil him rotten and he will be fine in no time.
Your best bet is to just put your dog to bed for the night and let him sleep it off. Feel free to wake him up in a few hours for a potty break and then put him back to bed. I would not try and feed a sedated dog as they could aspirate it.