Or is it just the case that people make mistakes. Some little, some big.
If the punishment for 'sin' is old age & death then are the animals sinners?
Why do they also get the cold, hair loss & cancer?
Is there some wee cat in history that let the cat kingdom down by eating the forbidden 'bowl of milk & crunchies'? Maybe a bigger, superior cat, conveyed the law against eating said munchies & little poor sinner cat ignored him? Hence, the rest of the cat race were subjected to eventual misery and death. The same scenario obviously occured among all the different animal 'kinds'.
The whole concept is surely deeply flawed, is it not? Or I am I looking at things too simply?