Just listen to your vet and see a surgeon if they recommend. Luxating patellas are graded 1-4, and the degree of luxation determines if surgery is needed. The experts can tell you so much, and the good news is that if the surgery is done well, results can be excellent. Just a good bit of cost and several weeks of recovery
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In the meanwhile, the vet may prescribe medication to ease the discomfort for Winni.
Hoping all goes well and it is just a quickly healing "something else."