I am currently feeding a stray/semi-feral cat. I have been feeding him for several months and I am going to borrow a trap and take him to the Humane Society (tnr). I noticed that he now has thick, goopy discharge leaking from his eyes and his lids are a bit swollen. Until my schedule allows me to get him to the Humane Society, is there anything other then L-Lysine that I can put in his food that will help his eyes?