Dog Breed theme and go to learn some new types of dogs while at it 
Easy - Terrier, Shepherd, Hound, Foxhound, Beagle
Medium - Collie, Sheepdog, Bloodhound, Coonhound, Boxer
Hard - Affenpinscher, Akita, Azawakh, Basenji, Beauceron
Dog Breed theme and go to learn some new types of dogs while at it
Easy - Terrier, Shepherd, Hound, Foxhound, Beagle
Medium - Collie, Sheepdog, Bloodhound, Coonhound, Boxer
Hard - Affenpinscher, Akita, Azawakh, Basenji, Beauceron