Once all 4 doses are used, it becomes an empty spice shaker that cannot be used for anything. Players may decant any smaller doses of spice together into bottles of larger doses. An admiral pie is often a better choice when it comes to boosting fishing, as the +5 bonus is guaranteed. It is suggested that you use a Wily cat to catch the Hell-Rats as they offer a better chance of killing the rats than any other cat.