My newborn puppy is weak, cold, and won't feed from mom or bottle.
I'm so sorry to hear about your pup. First step is to warm him up. A Heating pad set on low with the cloth cover on will work. Other types of warm packs are ok too as long as there is a towel/cloth between the heat source and the pup. Keep heating until a rectal temp of 99 is achieved.
Meanwhile, rub a small amount of white karo syrup or honey on his gums to help with low blood sugar. Between these two things he will hopefully perk up within 10-20 minutes enough to take the bottle/teat. Then feed as often as he cries.
DO NOT try to syringe or force food until you are sure he is swallowing well as this can cause pneumonia if he accidentally inhales a little.
Side note: I know it's silly, but be sure that you have poked a hole in the nipple of the bottle (many come with no opening which is weird).
Sometimes, despite these efforts, a puppy will not respond and you will need to see the emergency vet for IV bloodsugar and fluids, etc. Even then, we sometimes cannot save them and they do pass. Many times these are the runts of the liver or we suspect there is something else going on (born with a congenital organ problem).
Hope this helps and best of luck to you and the baby!
Updated on September 23rd, 2025