Oh Liz, poor Maxie!

It sounds like luxating patella, common in small dogs (like my bichons) and rare but occassional in cats. .01% occurrence in cats. And for some odd reason, when it does occur in cats it occurs on both sides.

It is genetic, and worsens over time. You will eventually need to have surgery for him. The sooner you have the surgery, the less permanent damage he will have.

Angell Memorial is the BEST animal hospital in your area. You need to start learning more about this condition, I'm afraid, and decide what to do and when.

Here are some sites to help get you started:
http://www.animalloverworld.com/cats...g_patella.html

http://www.cpvh.com/Articles/78.html

http://www.maybeckvet.com/mediallyluxatingpatella.html

This is a doxie but may be of interest:
http://en.allexperts.com/q/Ask-Veter...ng-patella.htm



Here is the link for Angell:
http://www.mspca.org/site/PageServer...ewrapperbutton