Cocker Spaniel first appeared in England and was gradually brought to America. It is quite a popular breed in America. Both of these breeds vary in appearance as the American ones have elongated muzzles and larger bodies. Some of the negative behaviors exhibited by this breed include aggressiveness while it is guarding, obsessive barking and behaving in a hyper manner. Sometimes submissive urinating is caused by this overexcitement. Canine Glaucoma is the major concern among the health issues faced by this breed. In this condition, the pressure of the fluid in the eye is on the rise which leads to visual impairment. Among the other health concerns are cataracts, patellar luxation, hip dysplasia, ectropion, entropion, PRA, otitis externa, allergies, lip fold pyoderma, liver disease, seborrhea, urolithiasis, prolapse of nictitans gland, CHF, phosphofructokinase deficiency, and cardiomyopathy and also IMHA (Immune Mediated Hemolytic Anemia). Cockers are prone to a specific type of PRA called Progressive rod-cone degeneration (PRCD), symptoms include night blindness at an early age. This breed is not suited to live outside alone in a kennel and as they tend to tear, the area under the eyes need to be wiped off frequently. Like other breeds, Cocker Spaniels are good in hunting, tracking and retrieving with their agility and smartness.