Good thing we didn't agree of what the vet said. Thank you for making me realised that my decision is not wrong. This community really helps me. Idk what's in that vet's mind. Maybe because chickens in our country only popular for cock fight, egg and meat so maybe he doesn't care that muchon how we feel about our pet. We're supposed to go meet the vet in person this coming saturday but after I saw all of your suggestions, my worries slowly leaving me. Just like what you all said here is more accurate. The wound looks ugly and black and some said that it will be fine and will going to be clear soon. Yesterday when we cleaned the wound, the black color is isn't that bad. I think its turning back again into its original color which is yellow.