As more countries legalize marijuana for medicinal and recreational use, the cannabis industry is booming. Some companies now even sell cannabis products for pets.

Homeowner Kelly Alto said that she and her fiancé decided to try one of these products to help with the serious separation anxiety of their dog Kogi. The two-and-a-half-year-old puppy is very attached to his family and does not like it when they leave him alone.

"It is even worse when we leave together," Alto told CBS News.

After researching possible treatment options online, they decided to use hemp oil, a cannabis-based pet supplement. The product does not contain THC, which gives marijuana its psychoactive effects.

"Before we could use it, we could hear it squeal and bark and jump and scratch at the door, and because we would use it, we could get through the hallway and not hear it panic," said Alto.

Several companies now produce pet products with CBD, one of the active ingredients in hemp and cannabis plants that can influence mood, health and body functions. Health claims include easing pain and anxiety and reducing seizures in epileptic animals.

CBD hemp products, not marijuana, are legal in every state and most can be purchased online.

But experts warn that the supplements are not necessarily suitable for every animal, and there is not enough evidence about how well they really work.

"An anecdotal story is not enough evidence to give it to many animals," said Dr. Jonathan Salkind, a holistic veterinarian.

He says that pet owners must remember that the FDA has not tested or approved these products for animals.

"Because there is more money in cannabis and marijuana, I think we will get better studies that can really show us the potential, because there is potential, but it's early," Salkind said.

Alto says she gave Kogi a dose of two or three drops, and believes that the effects have been positive so far.