Half Pint Palomino

My idea is based on a cartoon episode of that name. In the scene where the character uses makeup to make his donkey look like a female horse to attract a very small horse that was being sought after.
My idea would be a plot involving a western composed only of children, this character is reimagined as the sheriff girl's mount, again it's still a male character with makeup. When someone asks why the sheriff is putting makeup on her horse, she replies that she finds it more fun doing it with him than a doll. The character itself speaks. In this western, there are several western-like situations: a bank robbery carried out by a gang of cowboys; a train being raided to steal the cargo; a duel at noon. But all weapons would be futuristic. At one point the donkey character would ask if they didn't think this kind of weapon in the western is kind of weird, and someone would say "Sure, as if it makes sense that you're the only talking animal here".