Inseparable feral cats under a year old, caught one but can't get the other in this storm

There's two friendly cats that we've been feeding for a bit now and theyve gotten big after being fed by us and appear healthy, the problem is we caught one but the other one witnessed his friend be caught and taken away in the trap, and now refuses to touch it even though he is cold and starving. I've seen him try and examine how to get the food without entering. The trap is on my porch which is basically the hangout spot for all the ferals. Is this going to be significantly harder because he has separation anxiety and witnessed his friend get "abducted"?