The phrase "new feather" means something or someone that is new or unfamiliar. It's like adding a new feather to a bird's collection, symbolizing something different or fresh. Full definition
Flora returns to dance with new feathered friends in her third story. (booklistonline.com)
The latest trend is here to stay, our brand new Feather Necklace with Cubic Zirconia will be the must have accessory in your jewelry box! (onecklace.com)
Molly was wonderful at taking her meds and was very patient with us when we restrained her to put on her aloe, and within a week, we could see new feather growth.» (arlboston.org)