FDA Is Cracking Down on Pet Supplement Companies In April 2025, the FDA posted warning letters to four pet product companies in a single batch: CBD Dog Health, MycoDog, Bailey’s CBD, and HolistaPet. All four were cited for marketing unapproved new animal drugs — meaning their products made claims that classified them as drugs under the Federal Food, Drug, and Cosmetic Act, but none had obtained FDA approval. This wasn’t an isolated event. In November 2024, FDA issued warning