True signs of teething may include loss of appetite, swollen gums, and sometimes blood on objects, that your Chihuahua has been chewing on.
For puppy teething pain, there are a few different things you can do.
First, even if your Chihuahua has days when her appetite is down, continue to feed her dry puppy food, not moist food.
Not only is dry food best for her teeth and gums, the actual “crunching” on it will help her teeth to loosen as they as suppose to.
You can buy teethers that are designed to be frozen for puppies to chew on.
Or you can take an old dishtowel, wet it down, twist and knot it and throw it into the freezer for her to later chew on. This can be used several times by simply rinsing it out and refreezing it.
There's also the option of giving her ice to chew on. Many Chihuahuas love this!