Uncle Lucky

Uncle Lucky is a follow-up to Shorty,
and it involves Shortys mother, Ebbie,
who enlists her brother to find Shorty and bring him home.
He is unable to find the real Shorty and finds another pig instead and decides to paint him in the image of Shorty,
brings him home to his mother,
and when it starts to rain outside,
the paint washes off, exposing a fraud.