Although Henry's cousin Annie likes his dog Mudge, when she gets her own pet she decides that a bunny will be perfect for her.

Henry and Mudge the dog's boring weekend becomes interesting when Mom suggests building a castle in the basement.

Henry and his big dog Mudge attend a family reunion.

When his puppy Mudge gets dirty, Henry has some trouble giving him a bath.

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

When Henry has a snack, his puppy Mudge wants one too.

Henry, his dog Mudge, and his father enter a snowman building contest at the local park and win third place.

In the not-so-pretty house where she lives with her dad and bunny Snowball, Annie plans to make some changes in the decor with the help of her next-door neighbor and cousin Henry and his big dog Mudge.

Annie and her bunny watch and wait as a nest is built above the porch swing, and eventually they get to see the mother bird feeding her babies.