6. English Foxhound
Once a very popular breed among wealthy English fox hunters, the English Foxhound has declined considerably in popularity in recent years. Part of that decline has to do with the banning of fox hunting in the U.K., but the breed has never been a very popular companion or show animal. In the United States, they rank dead last in terms of A.K.C. registration, and they’ve fallen 30 places in the past decade.