Problem knees

Question
When my shih tzu walks her knees tend to turn outward.  At times I pick her up and I feel and hear them pop.  Is this a big problem?  I just adopted her from our local pound and they told me she is about 2 years old.

Answer
http://www.offa.org/patluxgeninfo.html
This page will give you all the information you are looking for.  This is treated with medication for minor cases to surgery for more severe cases.  You will need to speak with your vet to get a more clear diagnosis.  However, from what your describing I'm pretty sure this is the case.  I hope this helps.