Moo(n) (2003)

A little girl plays with her friend, a cow, until she catches a cold. Her parents take her away from the cow for safety and bring her indoors. As boredom sets in, the cow decides to jump over the moon. The little girl laughs to see such fun, but she doesn't laugh for long as the cow gets stuck on the moon with little chance of return.

Unfortunately the movie Moo(n) is not yet available on HBO Max.