Not only because the puppy must have the proper amount of nutrients but because early weaning can result in health issues later. A pup that is weaned premature and does not have a smooth changeover from mother's milk to solid food can end up with food allergies
Canines allergies can become a big concern for the owners of the dog; as they must be extremely attentive in regards to what the dog eats most likely for the rest of his life.
If you are owner to both mom and pup, be very careful when you feed the mother. A puppy can eat her food out of curiosity and end up with a very upset tummy at the least. It is the water dish that poses the most danger.
Chihuahua puppies are so small from just 1/4 pound to 1/2 pound (.11 to .226 kg) and can very easily drown in the water. If it seems unlikely, think again. All a pup must do is play around, crawl on top of its brothers and sister and end up in the dish.
So, to take all correct precautions, you must keep the adult dog food and water away! Only take it to the mother dog when it is feeding time and keep your eyes on the Chihuahua puppies at all times.
How to Wean
The adjustment of weaning a Chihuahua puppy from milk to solid food is a huge step. It is a good idea to carefully chose the brand of puppy food that you wish the Chi to be on. That will be your base for weaning.
The goal is to add warm water or milk replacer to the food. You will want to mix it thoroughly, adding liquid as you go.
The right consistency will be akin to a mushy, thick soup.
The very first bite will be not much more than a tiny nibble. The pup will sniff and be very curious, but sometimes shy about chewing and swallowing the food. On Day 1, be please if a teaspoon is ingested. This is just the beginning and is a good start.
Every few days, add less water or replacer to the food. As you go along, you will find that you do not need to put any additional liquid in the dish.
Remember just how tiny the stomach of a Chi puppy is... It is very common for owners to worry that the puppy is not eating, when in fact he or she is. The fact of the matter is that a tiny 4 to 6 week pup is only going to be able to ingest perhaps 1/8 to 1/4 cup of food per meal.
While you are paying attention to feeding the Chihuahua puppies, this will give the dam a good opportunity to leave for a bit. She will be very exhausted and in need of some alone time; much like a human mother who just needs to get away for a few moments to regroup.
Separating her from her pups will also allow her body to gradually stop producing milk.
As time goes by, the weaning puppies will become accustomed to having their mom gone for a longer and longer period of time.
Simultaneously, the weaning puppies will become more adjusted to your presence. This will continue on like a domino affect, until they are completely ready to move out on their own.