In my world which is pretty small,
If the CAT has no heartbeat it is DEAD.
Ifit does have a heartbeat it is ALIVE.
I know this is very exciting to learn and as a bonus I will supply one more example.
Iffen MY DOG were not breathing nor had a heartbeat it would be dead also..
Iffen he stops begging for Biscuits he is likely dead
Or he is extremely ill. lol!!!