Bill Peet moved major plot points (and many of the bells and whistles) from Dodie Smith's novel 101 Dalmations to the big screen for the Disney version half a century ago.
Apparently translating a book into another medium is not always as successful as the 1961 model turned out to be.
Broadway in Chicago’s ‘101 Dalmatians’ a dog of a musical
The conceit of this ill-conceived show is that the dogs are played by regular-sized people in spotted outfits, so Director Jerry Zaks has made all the people playing humans larger than life by putting them up on stilts. The resulting dog-people aren’t very doggish and the humans are like nothing on earth.
The pop-tinged score, by Styx singer Dennis DeYoung is almost completely forgettable, the exceptions being “Hail to the Chef,” a bouncy food song crooned by Cruella to the dogsitting cook while her henchmen make off with the pups, and a recurring reggae number, “Be a Little Bit Braver ...”
Four adults, ten kids, 15 real Dalmatians and a few dummy dogs and puppets portray the 101 canines of the title, but not very well. ... The puppetry simulating the puppy pack could have been done much better ...
I read Ms. Smith's opus about dalmations decades ago, but it stays with me still. Mr. Peet was faithful in his adaptation, although he left out a few poignant scenes (one with an old man remembering his faithful dog in front of a blazing fireplace) that failed to make the cut for the animated version, probably because they played well on the printed page but not on a storyboard.
A shame that the stage version of the book wasn't more riveting, but knowing the novel's challenges, I don't know how it could be. Animation really was (and is) the ideal medium for it.