The following breeds are now recognized by the American Kennel Club:

Collie & Lhasa Apso
Collapso: a dog that folds up for easy transport

Spitz & Chow Chow
Spitz-Chow: a dog that throws up a lot

Pointer & Setter
Pointsetter: A traditional Christmas pet

Great Pyrenees & Dachshund
Pyradachs: A puzzling breed

Pekinese & Lhasa Apso
Peekaso: An abstract dog

Irish Water Spaniel & English Springer Spaniel
Irish Springer: A dog fresh and clean as a whistle

Labrador Retriever & Curly Coated Retriever
Lab Coat Retriever: The choice of research scientists

Newfoundland & Basset Hound
Newfound Asset Hound: A dog for financial advisors

Terrier & Bulldog
Terribull: A dog that makes awful mistakes

Bloodhound & Labrador
Blabador: A dog that barks incessantly

Malamute & Pointer
Moot Point: A dog owned by ....oh, well, it doesn't matter

Collie & Malamute
Commute: A dog that travels to work

Deerhound & Terrier
Derriere: A dog that is true to the end

Bull Terrier & Shitzu
Bu....Oh, never mind.