The English Cocker Spaniel can be stubborn, but can be easily trained and make a good medium-sized family pet.The breed does not like being alone, and will bond strongly to an individual person in a family. Known for optimism, intelligence and adaptability, the breed is extremely loyal and affectionate.
A link between coat colour and temperament has been proposed. This link could be the colour pigment melanin, which is biochemically similar to chemicals that act as transmitters in the brain. A study made by the University of Cambridge involving over 1,000 Cocker Spaniel households throughout Britain concluded that solid colour Cockers were more likely to be aggressive in 12 out of 13 situations. Red/golden Cockers were shown to be the most aggressive of all, in situations involving strangers, family members, while being disciplined, and sometimes for no apparent reason. A study by Spanish researchers at the Autonomous University of Barcelona revealed a similar link between golden Cockers and aggression. Males were also more likely to be aggressive.