Fleas in dogs cause itching and hair loss. The most common flea in dogs is the cat flea, Ctenocephalides felis, followed by the dog flea, C. canis.

• 跳蚤能引起犬只瘙痒和脱毛。犬只最常见的跳蚤有猫蚤和猫栉首蚤，其次为狗蚤和犬栉首蚤。防治请见防治蚤病、去除跳蚤、驱除跳蚤。