English or American
Two distinct breeds now, related but separate. The English Cocker is taller and leaner with a longer muzzle and a more workmanlike head. The American Cocker is smaller, with a domed skull, shorter muzzle, and the heavier feathering that defines the show breed. We read which you have from your photo and renders accordingly. Both are breed-correct and both carry the spaniel signature.
Why the ears are the portrait
The Cocker's long feathered ears falling well past the jaw are a portraitist's gift — they frame the face, catch painted light along the feathering, and give the composition a natural downward sweep. Watercolor handles the feathering with edges dissolving softly. Meadow and Garden let the ears merge into floral surrounds. Vineyard suits the breed's English country origin.
Coat color tunes the palette
Golden Cockers (warm honey through deep red) sit cleanly in Meadow, Garden, and Vineyard — coat and palette agree. Liver Cockers (deep chocolate brown) catch Library and Watercolor with the most weight. Black Cockers become pure subject against any pale ground. Parti-colored Cockers (white with patches of color) read as graphic against Watercolor's softer atmosphere. We tune palette to coat.