Interestingly, composer Scott Bradley utilized Arnold Schönberg's twelve-tone technique for the cartoon's score—marking one of the first times this avant-garde technique was ever used in a film score.

Many fans consider this a spiritual sequel to The Bodyguard (1944), as it explains why Spike might be locked up in a pound. Production Credits Puttin' on the Dog (Short 1944) - IMDb

Sneaking Into the Dog Pound: A Look Back at " Puttin' On The Dog " (1944)

In the golden age of animation, few shorts captured the pure, frantic energy of the chase quite like the 16th theatrical Tom and Jerry short released on October 28, 1944 . Directed by the legendary duo William Hanna and Joseph Barbera , this episode takes the classic cat-and-mouse rivalry into high-stakes territory: a dog pound filled with Tom’s natural enemies. The Plot: A Masked Intruder

The story kicks off with a familiar scene—Tom chasing Jerry—until Jerry finds the ultimate sanctuary: a local dog pound. Knowing he’ll be torn to shreds if he simply walks in, Tom spots a plaster dog statue outside a pet shop. In a stroke of desperate genius, he steals the statue's head and wears it as a mask, hoping to pass as a fellow canine.

When Jerry runs into a dog pound, Tom takes the head of a dog statue and wears it in order to not get caught and try to catch him. Puttin' on the Dog (Short 1944) - Trivia - IMDb