I do not believe in vests for a dog while actually hunting. Just as collars that a dog can't slip out of are a no no while hunting so are vests. They can hang up on all sorts of things and a no no especially if you have a dog that will dive after cripples. It's better to have something to throw over you dog after the retrieve. If you believe it's so cold yoor dog needs a vest ,then you're better off retrieving the bird in your boat. Your pal will forgive you, after all he's still there enjoying the day with you.