When you do not believe all that is written in a book about how to train a Chihuahua the best thing to do is to experience it yourself. Well it is a risk you are taking. Understand by the time you experience each and every aspect of your pet for instance her eating habits and routine it is probably too late to train her in the right way. As a matter of fact, she may become very boisterous and stop listening to her master. What use is it to read a book on how to train a Chihuahua at this stage? The role played by her is interchanged with that of her master's.
Engage a trainer if required but ensure that she is properly trained when she is still young. As she becomes older she will become very stubborn and it will become much more difficult in getting her about. If you still have doubts on how to train a Chihuahua to be clarified ask your Vet to recommend a trainer for your pet. Remember all this needs to be done when she is very young. You may end up giving away the pet if you do not have her trained in time.