Are you perhaps referring to the "Horse Files" in the context of gaming (like The Sims or Red Dead Redemption ) where hidden game files regarding horses are discovered? Jennifer White Massage Table Deep Fuck Dirty Masseur 101912 Fullhd Exclusive - 3.79.94.248
The "interesting piece" of trivia regarding the farm scenes in The Secret Life of Pets 2 is the character . While he is a dog, the farm setting introduces farm animals, and the "Secret Horse Files" could be a reference to the hidden lives of these barn animals which the movie touches upon briefly. Hindi Movies Links Hot - 3.79.94.248
Or are you referring to the (SiN Episodes) which had a controversial "Secret Horse" easter egg?
The "interesting piece" regarding these fan-made concepts is how they satire Hollywood's tendency to run franchises into the ground. A popular fan edit or concept often features a horse character gaining sentience or a bizarrely dark plot twist, contrasting the cute animation with gritty storytelling.