So i took my piggy to the vet about a week and a half ago for a crusty eye. she said everything was fine normal breathing and heart sounds. He had solid poop and weighed a good amount (hes alittle close to being underweight so she told me to up the amount of pellets and veggies) She checked his teeth and they looked fine but he still had eye crust. She could not figure out why he had eye crust as he had no eye injuries (she used a dye and couldn't see anything on his eye) she gave me an ointment for his eye (Neomycin and Polymyxin B Sulfates and BAcitracin Zinc Ophthalmic USP, its a long name but thats what the box says) I was putting it on his eye for a week 2x a day and he looked better but his eye is crusty. Should i give him the cream again or take him in?