To be honest it really depends on the cocker so many have been bred too small in my opinion and they just can't handle a full days work as ever it is about picking your dog from a good working line, many with a lot of ftch in the pedigree are just 20 minute wonders and it is worth taking the time to buy in the right dog as some will disappoint.If it where my choice it would be a cocker all the way springers just have no soul that said after 20 years of working and breeeding cockers I could be just a little kennel blind