Rumble was born with a rare condition.

He cannot feel pain.
This, resulted in him living in a world that he doesn't, nor care to understand.

Dinky, has befriended Rumble for a very short time.
She never loved ; never pitied him for who and what he is.
In fact, she considers him her one and unique friend.

So why are six unworthy examples, doing their damn best to indoctrinate those foals on the values of 'Friendship' ?