We owned a GSP for eight years and took her duck and goose, phesant , quial , prarie chicken , sharp tail grouse, all in the same day for 3 seasons and she never gave up. It didn't matter how cold it was if they have the drive and want to hunt they will do it. Just bring them in at night and get them warmed up. She would retreve in ice water with snow and always right to hand.
She would retreve geese as big as she was. GSP are bred for an all around hunting dog if you get a good blood line.
I live to hunt and hunt to live