Same problem with my pit bull - she simply couldn't go out in the minus 30 degree weather and snow. After 2 minutes she would be limping and hobbling with frozen feet.
I just ordered Muttluks for her, and they are great! She's so happy to be able to go for long walks and keep her feet warm.
You can teach your dog to wear them. Get yourself all dressed up first, then put the boots on. Give a treat after each boot. The second they're all on - out the door with great enthusiasm.
These boots are made in Canada. They are not cheap but are well worth it!
MuttLuks