Primary angle-closure glaucoma (PACG): Most commonly affected: American Cocker Spaniel, Basset Hound.[1] Also over-represented: English Cocker Spaniel, Great Dane, Flat-coated Retriever, Shar Pei, Welsh Springer Spaniel, Bouvier des Flandres, Poodle, Chow Chow[9] Primary open-angle glaucoma (POAG): Beagle, Norwegian Elkhound.[3] Secondary glaucoma: Poodle, Cocker Spaniel, Rhodesian Ridgeback, Australian Cattle Dog, various terrier breeds (Cairn Terrier, Jack Russell Terrier, Boston Terrier).[10]