There is no sound for feeding zombie horses red mushrooms

Unlike regular horses and other mounts that can be fed, zombie horses do not have an eating sound/sound event for when being fed.

Steps to reproduce:

1. Spawn a zombie horse.

2. Give yourself a red mushroom.

3. (Optional) Enable closed captions to notice the issue more clearly.

4. Feed the red mushroom to the zombie horse.
   -> ❌ No sound is played, and no subtitle appears.