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Originally Posted by MyFairLacy  Luxating patellas are a hard one. Yes it's genetic but it can also be caused by an injury. Mild LPs can also be worsened by injury. A breeder ought to be only breeding sound dogs with tight patellas and ideally xraying and getting them OFAed. But sound dogs can have puppies with LPs. If a puppy has severe LPs and wasn't injured a breeder ought to cover it, but it is a hard one to cover because most toy breed dogs will at least have mild LPs and are usually jumping.
With that said I know who your breeder is...a local friend of mine has a dog from her too... |
The exam for OFA for patellas is a manual exam performed by a regular vet. No xrays are used. It is not the same as OFA'ing hips. Just an FYI. Here is the form for having patella's OFA'd:
http://www.offa.org/plappbw.pdf
My guess is that her condition, since it is in both knees and of two different grades, is congenital (meaning present at birth). Have the vet, after surgery, differentiate as to whether the groove in the bone was so shallow it needed to be deepened (congenital) or whether he was just repairing the soft tissue (more likely injury). Congenital however is not the same thing as hereditary, although many congenital defects are inherited. Really, what you would need to know is (a) whether the problems with the knee is a too shallow a groove which means congenital and (b) whether there are littermates, or full or half siblings (or parents) with the same condition. If so, most likely it was inherited.