I don't see luxating patella as a problem that is going to go away any time soon in any of the toy breeds. Although I agree that a grade 4 or grade 3 that shows up in a young pup is a genetic problem, a lot of toy dogs develop a grade 1 or 2 later in life from a life time of basically having a good time and doing what little dogs do, which is a lot of jumping and dancing around on their hind legs.
In my opinion, the groove that the patella rides in is shallow on all toy dogs but the patella is much more likely to luxate on a dog with poor structure over all. Yorkies with nicely structured rear legs will move with proper gait are less likely to put stress on the ligaments that hold the patella in place.
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Audrey |