Henry has no brothers or sisters, so he asks his parents for a dog. When they choose Mudge, the wriggling puppy has floppy ears and straight, soft fur. Mudge is tiny. But Henry knows he'll grow. Now Mudge is three feet tall, and he's the best friend Henry has ever had. Mudge trots to school with Henry, and he sleeps on Henry's bed. But one day the big dog goes for a walk by himself and gets lost. When Henry comes home from school, he is alone. Where's...

For Henry and his big dog Mudge, spring means admiring the first snow glory, playing in puddles in the rain, and watching the five new kittens next door.

Henry is excited when his Uncle Jake builds him a tree house but worries that his dog Mudge will not be able to enjoy it with him.

Annie and her pet rabbit, Snowball, invite Henry and Mudge to a dress-up birthday party, but there is some confusion about what the guests are supposed to wear.

At first Henry's very neat cousin doesn't like the cookies from under his bed or Mudge's slobbery kisses, but when they all play frisbee, she begins to enjoy her visit.

Henry and his big dog Mudge celebrate Henry's birthday with a pinata, a lively birthday party, and a cake shaped like a fish tank, making May first the best day ever.

Annie and her pet rabbit, Snowball, invite Henry and Mudge to a dress-up birthday party, but there is some confusion about what the guests are supposed to wear.