I'm glad you found him. I hope the vet can be of of assistance with this injuries. I always worry about the internal injuries that may not present symptoms immediately. Keep a close eye on him for changes in his gums if they start to look pale, in his pupils if they start to dilate, excessive licking of his body somewhere, or of changes in his diet such as not eating or drinking. So glad he his back; I know the worry that comes when they are missing. He his safe being back with you and hope he will soon recover!