[dinosaur] Could feathered dinosaurs survive post impact freeze?

[Poekilopleuron <dinosaurtom2015@seznam.cz>]

Good day,

a recent study in Geophysical Research Letters postulates at least three years long freezing (post K-Pg impact) temperatures. About 26 degrees drop must have been very harsh for dinosaur populations worldwide, but is it possible that at least feathered, cold-adapted species could survive a few years of this freezing hell? Thank you very much, Tom