Animal spawn eggs occasionally spawn baby animals

The bug

Using a spawn egg will occasionally spawn a baby rather than an adult, regardless of whether it was spawned on another adult.

Affected animals

(List may be incomplete)

• Horses
• Donkeys
• Mules
• Ocelots (baby spawns together with parent)

How to reproduce

1. Get a spawn egg, for example a horse spawn egg.
2. Use the horse spawn egg. (not on another horse)
   → Notice that a baby horse has been spawned (after few tries)