“The second half resolves the situation. The Puppies discover the landowners daughter likes ponies and shes been invited to join the Pony Sisters Club. The Puppies see inside her apartment and see every inch of wall and table filled with colorful pony figures, artwork, etc. Eventually, the Puppies arrange for the pups to meet the children at one girls pony ranch and for the landowner to arrive, too. Turns out the father, the landowner was the pony lover and all the colorful pony stuff in the apartment was his. He was a member of the Pony Boys Club and wanted his daughter to be in the Pony Sisters Club.
 
There were a number of references that could be interpreted as MLP:FiM pokes: