Oh that's good he's eating. Rest is medicinal, that's nice he's comfortable. That sled idea seems helpful! I can't recall anyone trying it, but as long as it helps him stay comfy that's good.

You're right, some discomfort is expected and with Shepherds being so vocal as it is, it can be hard to tell when they're talking about pain or something else. You know him best though. If you feel the pain is getting worse let your vet know. The Gabapentin dosage is acceptable, and it's what our Wyatt took for maintenance when his arthritis got bad. But for dogs who need more pain management after surgery, we've seen at least one here whose vet (Dr. Downing in the video I shared) bumped Gabapentin up to 5,600 mg per day (1200 was at night). Most vets would freak at that dosage, but this particular dog responded really well. That dog was also on Amantadine. So, just something to consider. I hope he continues to show improvement so you don't have to add any more in but if he does, there's other pain control methods out there. Keep us posted OK?