While hunting the last day of December we opted out of paddleing to our spot and hunted the shore (-13). Still, we had to retrieve a few birds by canoe early. At first light partner shot a bird and it started drifting out of safe retrieving range for the dog.
Off in the canoe he went PFD'd up but in that air temp trouble happens quick. I went through the actions I would have to take if he went in,canoe ,pfd paddle all in place plus phone ready to make the 911 call. I did paddle out for the next bird, and we had discussed the conditions, the freezing fog glazes everything as soon as it touches it .

I always wear a Pfd once under way, years ago a ranger we know passed out and rolled his boat on opening day ,he went under and his partners had a hard time getting to him (no pfd). He lived but infections in his lungs almost killed him. Since that time I have always wore one. The few times I have had the misfortune to be in the water the pfd kept my head and torso dry and made self rescue possible.

Late waterfowl hunting ,it is what it is.