Despawn water lurker when he eats meat?

[DeAngelo]

Quick question, what script would I use to despawn a water lurker once he finishes eating a piece of meat? I want to despawn him then give a message of "That should keep it busy for a while, at least long enough for me to get that gate open" (I would just make the player hurry and get out while he eats, but for some reason half the time he ignores the meat altogether, some times he finishes eating it in like 3 seconds then comes after me, and a few times he spends the proper amount of time eating it.)

Thanks.