Primary entropion is common in certain dog breeds including the Chow Chow, Shar Pei, Bouvier des Flandres, Rottweiler, Labrador, Golden Retriever, Great Dane, St. Bernard, Leonberger, Bloodhound, English Cocker Spaniel, Basset Hound, Pekingese, Shih Tzu, Pug, Toy and Miniature Poodle, Cavalier King Charles Spaniel, and English Bulldog; and in Persian and Maine Coone cats.
A common
primary cause of canine conjunctivitis is chronic irritation and / or exposure resulting from anatomical problems of the lids (
entropion, ectropion) or eyelashes (e.g., distichia, trichiasis).