As each puppy is born, the mother Chihuahua will lick the pup clean and also chew away at and possibly eat the umbilical cord.
Again, this is a natural instinct. When the dam licks the pup, she is also stimulating the newborn to breath. During this time you can help clear away fluids by gently using an infant suction bulb to the mouth and nose. Using a clean soft and small towel, you can carefully wrap the newborn for a moment, gently wiping away fluids without impeding the dam's instinct to lick.
Just as with humans, the placenta will need to be pushed out after the birthing. When the final puppy comes out, the placenta will soon follow. As you may have guessed, the mother Chihuahua may eat this as well. Whether the mother eats the sac, the cord or the placenta, do not stop her as it is a very strong inbred instinct for her to do so. If the dam does not chew the cord to release it, it must be cut with sterilized scissors approximately 1 inch from the stomach and tied off with sterilized thread if it is bleeding.
If a Cesarean is performed, your Chihuahua may experience fur loss as a result of the anesthetics. This is a normal reaction and in time, the coat will grow back. Due to changes in hormonal levels, a heavy shedding
is to be expected after birthing a litter; this is known a 'blowing the coat'.
Remember, if it was a rare occurrence for a Chihuahua to give birth and have healthy puppies, this breed would not be around! Archaeologists estimate that the Chi has been with us at least since 600 AD. Therefore, while there is always a risk of stillborn puppies or a need for medical intervention, most Chihuahuas will be just fine.