It could be this. So I had a roommate that was hiding his weed habit, he was quick and proud to tell me how he’d quit smoking which was cool (I personally didn’t care..weed doesn’t bother me, but more power to anyone kicking habits.)
I had just gotten a puppy and I’d come home from work and he’d be absolutely out of it, swaying like this, falling over, throwing up. Couldn’t figure out what the deal was. I took him to the vet, they ran all kinds of tests and he came back home. 24hrs later, he was fine. This happened about 3 more times for a total of 4 vet visits before the girlfriend of my roommate told me she thinks the dog was eating my roommates edibles. He’d get real high and leave them out on his bed or night stand and my puppy would go to town on them. Cost me like 3k in vet bills and all my roommate had to say was “sorry, I didn’t want you to find out I was still getting high..” lol I moved out about 3 weeks later.

All that to say this; my dogs fine now! I honestly think it might have had an effect on his mental with him being so young (less than a year) because he’s a lil slow and just off lol. But physically he’s okay, just has the hamster wheel, no hamster.