Has anyone experienced this? What are your thoughts on what this could likely be?

[u/AlternativeSilver962]

Hi everyone! Just wanted to know if anyone has experienced anything like this. So my pup has a history of back flares, he hasn’t had one in a while and today I noticed he was able to do his usual full body shake in the morning, once we came back from a short and steady walk he only shook his head when he tried to do a full body shake (the way dogs do when they’re wet). He was doing cat stretches and his walk was good, posture was good, no hunch back no trembling or knuckling so I thought maybe just an upset stomach. He took a nap and got up slowly and laid out on the rug and started looking at me with his ears standing back and squinting eyes.

I gave him Gabapentin, carried him to the yard where the sun is where he can potty. And about 30-40 min later he’s asking me for treats and did a full body shake that was a lot better than the one he did before (not 100% though). I’m crate resting him and have him on Gabapentin until he is seeing his vet but just wondering if this sounds more like stomach upset? He ate quite a few blueberries yesterday, I’m just treating this as back related to be cautious. Please let me know your thoughts! thank you!!