how to use a syringe to feed a newborn puppy – step by step video nadia August 29, 2017 chihuahua facts, chihuahua health concerns, chihuahua videos if you have a newborn puppy that isn’t able to nurse because it’s too small, too weak, or has too much competition from the other siblings in it’s litter, you can feed them formula by using a syringe. Follow Famous Chihuahua on Istagram share this on social media!