Luring a wild cat

We had a ferral kitten that came up about three or four years ago. It was a tiny thing. I rigged up a $10 flat rate postal box as a box trap and put some tuna in it for bait and caught the little bastid the first try. He's one of our sweetest cats now.

That's what I had in mind too. Only my other cat is a real lunkhead, huge fat beast I call Scamp. He's an idiot and now he realizes I want to catch the other cat, so he ate all the food and won't come to me so I can put him inside to leave food for the other car.

I think he's jealous...or maybe he's just hungry (as if, he must weigh as much as the 340 in my Duster)