Whats wrong with baby horses. Again?!?!

When I feed a baby horse, then it grows into an adult horse just with one piece of food. And when it grew into an adult Horse and I right click on it, I face another direction automatically and it still sounds like a baby horse. And I have to feed it a lot of times until it sounds like a Adult horse. This is a weird bug (Also happens with Donkeys and Mules). Please fix it Mojang