Buy a small thin collar for him to wear, don't let him wear the collar when you are not around but let him wear it at home.
Use a soft collar, nylon, I reccomend Rogz collars in the smallest size they would be perfect for him.
__________________ Sun [Owner]  , Fido [Yorkie]  , Mímir [Chinese Crested]  , Kría [Icelandic cat]  , Skuggi [Forrest cat] |