To make the cheese ball, combine the softened cream cheese, Borden cheddar, chicken, ranch mix, and mayo in a large bowl. Stir to combine. Spoon the mixture onto a large piece of plastic wrap and wrap it, forming it into a ball as you go. Refrigerate for about 4 hours to allow it to firm up. Once it is firm, it will be even easier to form. Once firm, unwrap and carefully coat with pecan pieces.