Currently, there have been no formal studies showing effectiveness of CBD in pets. But, similar to humans, we do know that animals have an endocannabinoid system and we do know that CBD affects this system. Similar positive affects on overall health has been observed with animals as it has been with humans. Side effects to potentially be aware of are dry mouth, lowered blood pressure, and drowsiness.
Use the same principles I teach for humans of low and slow is the way to go. I do not claim to be an expert on CBD and animals but there is cautious optimism about its effectiveness.