Up until recently, marijuana intoxication has seldom been fatal. Second hand smoke can be a potential issue on your pets depending on level of exposure. Deaths are more commonly noted after ingestion of foods containing highly concentrated marijuana such as medical-grade THC. Fatalities were very rare until the development of medical-grade products. For more complete information, you can read the following article on our resources page in the pet health section: “Marijuana Intoxication in Dogs and Cats”