On a winter’s evening in 1949, Walter Chandoha was walking to his three-room apartment in Astoria, Queens, when he spotted an abandoned gray kitten shivering in the snow. He put it in a pocket of his Army coat and brought it home to his wife, Maria.

The kitten’s antics — racing through the apartment each night as if possessed, shadowboxing with his image in a mirror — inspired the couple to name him Loco. Mr. Chandoha (pronounced shan-DOE-uh) was moved to photograph Loco and quickly sold the pictures to newspapers and magazines around the world.

Taking pictures of cats soon began to look like a more fulfilling career path than the one in advertising that Mr. Chandoha had planned while attending New York University, after serving in World War II. So, after graduating, he turned to freelance photography for a living — and, by the mid-1950s, he had begun a long period as the dominant commercial cat photographer of his era.

“Walter Chandoha’s cat models, shown on this page, must be alert, graceful and beautiful,” read a newspaper ad in 1956 for a cat food brand that featured his photos. “To keep them that way, Mr. Chandoha feeds them Puss ‘n Boots because Puss ‘n Boots is good nutrition.”