It is noteworthy for producing one of the most varied numbers of pups in a litter among all dog breeds. This breed seems to have a perpetually wagging tail and prefers to be around people; it is not best suited to the backyard alone. Cockers can be easily stressed by loud noises and by rough treatment or handling. When trained with a soft hand and with lots of rewards, the Cocker Spaniel will be an obedient and loving companion with a happy, cheerful nature. Today, this breed is experiencing a resurgence in usage as a working and hunting dog. Dogs from working lines are noticeably distinct in appearance. This is a result of selecting for different traits than those selected by show breeders. The longer coat and ears, selected for the show ring, are an impediment in the field. Cuban authorities train and use English Cocker Spaniels as sniffer dogs to check for drugs or food products in passengers' baggage at Cuban airports.