Comfort for when an animal friend or any friend dies

A group of students of a Tibetan Buddhist Lama were walking through a forest with their teacher.

They came upon the body of a young man. The students looked the man over, looking for marks, blood, any of the usual indicators to explain why a person might die.

They found nothing. Puzzled they asked their teacher:

Why did this young man die?

The wise Lama said: Because he was born.

May this simple thought and perspective ease your pain.