chirin suffers something akin to an anxiety attack after his mother dies, pleading for her to come back. although it depends on your interpretation, it is a sudden, fearful reaction to the event.
chirin is seen panting while he is training with the wolf, but it is a post-exercise heavy breathing as opposed to anything that could be potentially triggering.
A mother sheep gets killed by the wolf. A deer is killed by the wolf. A mother bird gets killed by a snake, the bird´s nest then falls on the ground and the baby bird eggs break.