We've treated a dog for Alzheimers using oil, and it just made her normal again. We treat dogs on the 4th of July, and it calms them down.
I've seen dogs that have consumed cannabis on the sly, and they were pretty loopy, but it also made our German Shepherd female skidish and overly concerned with events, as if she might be experiencing paranoia. Their systems aren't like ours, but I suspect they experience some of the same reactions that we do, though maybe at different dosages.
The difference may be that they don't know what is happening to them, and can be fearful, so I would never dose them for no reason, anymore than I would slip someone a medible on the sly.
We had 3 dogs, all with different needs... Bear- our oldest who we recently lost to bone cancer, loved bud.. he'd beg for it and knew where Draig kept it... he was a 15 year old HUGE black lab with joint displaysia, cataracts and (unknown to us) Cancer. We only gave him a single small bud at bedtime- or if he was in pain... once made the mistake of using canna butter that was way too strong for him.. he was disoriented and scared and for the 1st time EVER was growling at people-- probably didn't recognize us.
Our Chihuahua has cataracts, arthritis, a heart condition and has seizures; because of the last 2, we do not give him any, since- though it would help his painful joints, being so small, I am afraid it might cause his BP to drop or induce a seizure...
Our Youngest Lab had her knee replaced and has joint problems (Most Labs do) She begs for buds at bedtime- and gets just enough so she isn't in pain- but only when she 'asks'...
Dogs know what it is, and either like it or don't... and if my pets are in pain and I can help- damned right I'm givingit to them- but judiciously, and with great thought & care on the type and amount.
People who think it is funny to "trip out" their pets for fun have no business owning them... like the A**H**s that put their cat in a paper bag and blew doobie smoke in it... yeah-- lets do that to you... it is suffocating the cat-not just stoning it... and even just getting it stoned is WRONG... would you do that to a baby? Wait- never mind-- don't answer that... I really don't want to know!
(Aimed ONLY at those who think it is SO funny!)