At the end of my rope had to feed the orange tom cat.

Some of you may know I've been trying to catch an orange stray tom cat. Well I've only left food in the trap for him for about a month or more and not even a hint he'd been there. Last night he came up on the back porch while I was in the barn and I walked up on him (first I've seen him up close in a long time) and he looked HORRIBLE. I tried to get him to come to me, but he just looked at the food in the trap and then left. I went upstairs, got some tuna, put some wormer on it and left it out for him. I watched it until midnight and he hadn't come back, but this morning, it was gone (thank goodness) I just don't know what to do. He was obviously starving but will not go into the trap. I had to feed him.....I don't know what to do! Tonight I'm going back to putting Tuna in the trap. I guess there's nothing else to do???