Cheaper by the Dozen?

Eleven puppies (9 boys, 2 girls) and their mom = a dozen new dogs.

Cheaper by the Dozen is a book (made into a movie in 1950 - NOT to be confused with the 2003 version) about husband & wife time and motion experts who had 12 children and imposed their ideas about efficiency and thrift on their brood.

But as adorable as our new dozen dogs are, I'm not convinced that dogs are cheaper by the dozen.