The Puppy Who Wanted a Boy by Jane Thayer, illustrated by Lisa McCue, 1958, 1985.

A puppy named Petey tells his mother that he wants a boy for Christmas. His mother says that he might get one if he’s good, and when Petey is a good puppy, his mother tries to find one for him.

Unfortunately, Petey’s mother just can’t seem to find a boy for Petey anywhere. She suggests trying to see if any other dog is willing to part with his boy. However, no other dog wants to give up his boy.

Eventually Petey comes to an orphanage with a sign that says Home for Boys. Petey decides that if the boys have no parents, maybe they could also use a dog. It’s Christmas Eve, and most of the boys are inside are singing Christmas carols, except for one boy, sitting by himself outside.

Petey jumps into the lonely boy’s lap, and the boy loves him right away. When a lady comes to check on the boy, the boy asks if he can bring the puppy in, and she says yes.

All of the boys in the home love Petey and want to keep him. The lady says that Petey can stay if his mother lets him, and Petey knows that she will. Instead of getting just one boy for Christmas, Petey found fifty!

The story was first published in 1958, but my edition is from 1985 and has different illustrations. In the older book, the puppy looked like a beagle.

The book is available to borrow and read online through Internet Archive (multiple copies).