"He gets very nervous even with a thunderstorm, so fireworks are above and beyond. I have to keep him in the bathroom in the middle of the house so he's away from the windows, so he doesn't feel he's under attack," said Chitwood.
It's not entirely understood how CBD has a calming effect on dogs and cats. The compound may suppress some neuron activity, or stimulate serotonin transmission between cells.
But some veterinarians aren't sold on CBD and won't recommend it to pet owners.
They say it's unregulated, could badly interact with medications, and hasn't been thoroughly researched.
"I think it should be a concern of anybody. I think anybody would like to feel whatever they're taking or their pet is taking, there is some history behind it, there's science behind it. There's just a lot more to be learned." said Dr. Michael Good, a veterinarian.
But one cat owner said he's a fan of CBD. His cat refused to take a bath. But after getting a CBD treat, he climbed into the tub.
"You could see the change. He just calmed down, mellowed out." said pet owner Matt Lee.