Posts Tagged: Can dogs be allergic to vape smoke November 3, 2022 by Rocklin Ranch Veterinary Hospital Is Vaping Near Pets Dangerous? Like other chemical-containing products found around the house, vaping devices should be kept out of reach of pets. E-cigarettes contain chemical concoctions that may include nicotine, formaldehyde, propylene glycol, glycerin, and THC (the active compound found in marijuana)—and the inhalation or ingestion of these substances can be extremely harmful to animals.