It says in the Breed Standards which breeds are meant to have webbed feet & these include Newfoundlands, Chesapeake Bay Retrievers, Otterhounds, Spanish Water Dogs etc but the Cocker Standard doesn't require webbed feet - Cocker feet are meant to be tightly-knit, round & cat-like with nice, thick padding underneath (for endurance & protection) but sometimes you do get flatter feet with more splayed out toes which can look like webbed feet (and sometimes very tight trimming can give this appearance too)
Jane