I hunt a wirehair, she's 15 this year, doesn't get a lot of dry bird work anymore with her age and hips, but she still loves to get ducks for me. A pointer will shiver when it's still in the 60s, I don't worry about her too much during the hardest parts of winter, because when it's too cold she'll let me know (ie I'm retrieving my own birds at that point). I also hunt from my sneak boxes a lot, so not a ton of room for kennels, or extra heaters.
- neoprene vest for sure
- absorbent on the floor, yep (also helps keep the noise down in the boat when you're sculling in close on birds

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- 1 thing I hadn't seen on this thread yet, go onto amazon and search "neoprene blankets" - easy to pack on the boat and still effective with a wet dog, rain, snow, etc.
- Just like you, make sure pup stays well hydrated in high AND low temps
- hot fuel (higher carbs and fat) treats after retrieves will kick up the metabolism and body temp
if it's real cold, or retrieves have kept pup in the water for longer than normal, take a break and get in a walk (or auxiliary quail hunt, depending on where you typically go), maybe even loose the vest for a bit, This not only get's good blood flow it also let's her shed any excess moisture trapped in the coat and vest, which can accumulate if they are stuck sitting still in the boat between retrieves over a few hours.