Henry's puppy Mudge enjoys playing with Fluffy the cat.

Just when Henry thinks it's safe to snuggle up with a good book, Mudge has other ideas for the afternoon.

Henry worries about what will happen to his big dog Mudge during their visit to his grandmother's house in the country.

When Mudge gets sick unexpectedly, Henry does all he can to make him feel better.

While Henry's parents are at a Sweetheart Dance on Valentine's Day, he and his dog Mudge have a wonderful time staying at Mrs. Hopper's house, where they enjoy tea and music and dressing up in various costumes.

Annie forms a club for girls who love teacups and other dainty things, but she will always love her cousin Henry and his big drooly dog too.

Pandora the cat becomes a lighthouse keeper and saves the life of Seabold the dog, and together the two of them create a family with three young mice rescued from the sea.