Three horses

It is Snowy the Shetland pony's birthday and Princess and Seb have planned a surprise trip to the movies to celebrate--but three horses in a movie theater are bound to result in one smelly situation.

"Seb, Princess, and Snowy are the three horses who call themselves the Tres Caballos Incognito, and they like to break out of the barn at night and go on adventures--and tonight's adventure is a trip to an amusement park where Seb the draft horse is looking forward to riding the roller coaster, and gathering more material for the book he is writing"--OCLC.

Princess is a show pony who is absolutely convinced that she is a cat and needs to hunt for her dinner, Blizzard (otherwise known as Snowy) is a Shetland pony who needs material for the book he is writing, and Sebastian is a draft horse who knows how to break out of the barn; so together the Tres Caballos Incognito set out for the clover fields looking for adventure--where Princess chases a squirrel and gets stuck in a tree.

Seb the draft horse is very upset because a friend from the neighboring farm has moved away, and Snowy and Princess decide that a seaside adventure will cheer him up because he has always wanted to swim in the sea, and anyway Princess wants to catch a fish (she is convinced that she is actually a cat)--but when Seb swims out too far and panics, it is up Princess to rescue him.