Ms. Stewart declined to comment beyond her statement.
Last fall, Mr. Linton said, Ms. Stewart visited Canopy’s factory in Smiths Falls, Ontario, and exhibited a curiosity about all aspects of marijuana growing and production.
“She talked about gardening and wondered about the scent,” Mr. Linton said. She schooled him on plant aroma and how it can be used to brighten a room.
He said Ms. Stewart did not try any of the company’s products, which include oils, capsules and dried leaves.
Ms. Stewart, though, told The Hollywood Reporter in her interview that Snoop Dogg had introduced her to CBD-infused cream. She recalled an episode at her estate in Bedford, N.Y., where she was having lunch with the rapper, friends and her daughter, Alexis. A rock fell on her toe. So Snoop Dogg raced to his car and fetched a tube of CBD-infused ointment, which she rubbed on her foot. “I must tell you, my toe got better within two days,” she said.
The cannabis plant contains dozens of cannabinoids, among them THC (tetrahydrocannabinol) and CBD (cannabidiol). THC has the psychoactive properties that make people feel high but are toxic to animals. CBD, on the other hand, offers the benefits without the buzz. Industrial hemp, used to make textiles and paper, is also used in pet products because its THC levels are negligible.
CBD products are increasingly popular with pet owners, which is, perhaps, one reason Ms. Stewart is entering the fray. The Food and Drug Administration has not approved cannabis for pets, in part because there is little research showing its effectiveness. It acknowledged, though, that it had not received reports of adverse effects of hemp or marijuana-derived products on animals.
Still, many pet owners swear by CBD, saying that their animals are less anxious, that they have less pain and that it fosters better health.