Above is the chart about the statistic of Chihuahua bite.
Chihuahua dog is a small breed dog, sometimes we judge them not dangerous, but it is the opposite. Although Chihuahua has a small body, they tend to be aggressive, because of the lack of body size they cover it up the weakness with their attitude by being aggressive.
If you want to adopt a Chihuahua, please make sure to train and not bully them, they need to be treated with respect and love, otherwise, it will have an aggressive attitude such as biting and barking. If you have these kinds of a breed and have the attitude of aggressive please do not let them near children.