I don't know, but I would definitely be careful about using it on them. I've been trying to get past my bias about cannabis and using it for pain, etc. in people, but . . . just because it's natural doesn't mean it's safe, and I'm just not comfortable with it's use in people, let alone pets.
I'm definitely not certain about using CBD oil with pets for pain no matter how many people sing its praises. I realize it's not exactly the same as medical marijuana, but it's still a cannabinoid, and the syndrome had the word cannabinoid in it,
not "marijuana hyperemesis syndrome"
but "cannabinoid hyperemesis syndrome."
The CBD oil (from what I can tell) has been used much less than actual marijuana, so I'm not sure what kind of actual testing might have been done with it.
SO, this means I need to be looking for other alternatives for pain management if either of them end up old and arthritic. I thought CBD oil might be the solution, but I'm not so sure now.