Awww lil puppy! Enjoy your nice warm new bed!
Are you still going to try to get him to feed off mom? I don't know much about breeding dogs, but I know with rabbits the runts always do better if you can get the mom to feed them at least once a day (of course, the mom's are not big fans of this, as it goes against their nature). Their milk is so much more nutritious than the store bought stuff! Is it the same with dogs?