With some information and practice, along with consistency, training a German Cocker spaniel is no more demanding than training other spaniel breeds.
There are various options open to the potential owner for training but, at the very least, some basic spaniel training should be undertaken to encourage and develop good behaviour, which will include coming when called or whistled, sitting down and walking properly on the lead.
Training is important and, as well as working the dog physically, will also tire him mentally – an untrained dog will quickly become bored and potentially disruptive. This is true of all spaniel breeds.
Spaniels enjoy training, are quick to learn and they love the interaction with their owners that training provides.