When I breed my two horses with a golden carrot the offspring is grown up, yet you can't ride it.

Put the summary of the bug you're having here
When I breed my two horses with a golden carrot the offspring is grown up, yet you can't ride it.

What I expected to happen was...:
My two horses would make a foal

What actually happened was...:
They made an offspring but it looked like an adult and you can't ride it
Steps to Reproduce:
1. Get a grey horse with lighter grey speckled on top
2. Get a brown horse with big white spots
3. Breed them with golden carrots