I suppose "cold" is a relative term. I don't think of it as cold until it gets down to about -20. I grew up in Saskatchewan where the winters are very cold -30ish or worse is the norm, ah I remember the tires on the cars would freeze up so they were almost square and it gave the weirdest sensation. As for dogs feet and the cold , Chum has boots he wears when it gets near -20..and a coat as well with fleece lining and a waterproof shell. Me I wear an ankle length down filled leather coat and mukluks. I can't seem to find a pic of Chum in his coat but here is a shot of him in his boots.
Master Cholmondeley Esquire (Chum) English Springer Spaniel born 2003/2004(?)
Miikka Chu 4/2005 Bichon/Cocker Cross
Minnels Morgan 11/2005 Bichon/Cocker Cross
R.I.P. Boog,Pootie, Bud & Tarkha
I look into your soft brown eyes,
Where love and loyal homage shine,
And wonder where the difference lies
Between your soul and mine!