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Originally Posted by Lovetodream88  As far as I know there is no actual test except just checking the knees. A really good breeder should make sure there is no LP in any of the dogs lines and that her breeding pair is also free from it. |
You are correct. They still have to physically check the knees and remove dogs with luxating patella from the breeding population. They are still doing genetic mapping tests of luxating patella in various dog breeds, but it seems to be a complex trait, and the genes tentatively identified in some breeds are not the same as the genes involved in other breeds. A DNA test for luxating patella carriers is still along way off. Here's a link to a recent study of Pomeranians:
https://www.sciencedirect.com/scienc...34528816306099. From the study: "The loci identified in Pomeranians were not associated with PL in the cohorts of Dutch Kooiker dogs (Wangdee et al., 2014), Dutch Flat-Coated Retrievers (Lavrijsen et al., 2013), Dutch Labrador Retrievers, Thai Chihuahuas, and Thai Miniature Poodles. The loci involved in PL may be different in these breeds. Apparently many genes influence the PL status and the gene variants involved are not shared across breeds."