“Cannabinoid receptor type 1 and 2 expression in the skin of healthy dogs and dogs with atopic dermatitis…The endocannabinoid system and cannabimimetic compounds protect against effects of allergic inflammatory disorders in various species of mammals. Results of the present study contributed to knowledge of the endocannabinoid system and indicated this system may be a target for treatment of immune-mediated and inflammatory disorders such as allergic skin diseases in dogs.”

http://www.ncbi.nlm.nih.gov/pubmed/22738050