“That's the hairiest show cocker I've ever seen

”
That blue roan definitely needs a good grooming (doesn’t have to be clippers, can be scissors). The Cocker Spaniel Club produces a booklet on grooming show-type cockers. It’s not difficult to groom a show-type cocker at home, at least for general pet purposes; grooming to show standard is another matter.
Many pet owners of show-types who don’t show have their dogs clipped more or less short, often removing the feathering which is one of the beauties of cockers. A well-groomed cocker has a more-or-less straight coat with a silky texture.
http://www.thecockerspanielclub.co.uk/aboutpage.htm for some pictures of nicely groomed dogs.