Feed the cat during the day, take up food at night. Hmmmm, cat will still smell like cat food, might become raccoon dinner. Use the trap. If you can't make the coons someone else's problem (relocate far away), dispatch with no less then .22LR (do NOT start shooting it with .22 bird shot, you'll be sorry for going down that road):
Bad Ratshot Experience Here
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When Banjos are outlawed, only Outlaws will have Banjos
The Bible is my lawbook. I turn the other cheek when applicable, and spend the rest of my days resisting evil at every front, until I have breathed my last breath.