Daschund Jaw Problem?

Question
Ruby is a two year old female daschund.  Within the last week I have noticed that she does something unusal with her mouth.  Her bottom jaw shakes and or vibrates up and down.  I thought maybe she has a bad or loose tooth but I've opened her mouth and look and felt all her teeth.  I don't find anything abnormal but what else could it be?

Answer
It certainly sounds like something with the teeth. Maybe something is out of alignment and not fitting quite right anymore. I would certainly have the vet take a look-see the next time you take her in for something. If this behavior worsens/increases, get her in for an exam.

Karen