We have a feral (well, mostly feral) cat that lives outdoors. We inherited him from the previous owners when we moved in almost 2 years ago. One of his eyes is swollen nearly shut and has some white/clear discharge. He eats breakfast and dinner outside our door, but doesn't let us near him. My husband occasionally manages to administer flea treatment on the back of his neck while he's eating, but that's it. Any recommendations for what to do about his eye? We first noticed it yesterday. How long should we monitor before considering trapping him to take to the vet? Anything we can do for him without a trip to the vet? Thanks!