The wound was not handled well at first, so I dared not close it because it was too painful. My mouth is always open and my mouth drools normally. It must be hard for dogs now. First, buy some medicine to treat ulcers. Don't give him hard food. Have some egg custard and leave him alone. After a while, the pain will go away. After all, there is nothing we can do. And painkillers and anesthetic. Take what he likes, Doby. He takes it out again, but be careful. Don't touch the wound. Try not to give it to him.