Oats is an original character from the Land of Stories series. He is the son of Goldilocks' horse Porridge and a horse from Queen Red Riding Hood's stables, Buckle. He first appears in chapter 4 of A Grimm Warning.
Appearance and Personality
"Alex turned to see a white-and-brown-spotted foal walked down the aisle. He held a basket of rose petals in his mouth and was breathing very heavily, blowing the petals out of the basket and scattering them across the ground with every exhale."
In Beyond the Kingdoms, it is mentioned that Oats is now nearly the size of his mother. He, Porridge and Buckle transport the friends to the Masked Man's cave. Red Riding Hood and the Lost Boys ride and his parents to Morina to search for Froggy.