When does something become a recognised breed-specific health issue?

Exactly as the (rather long) title says, really. In some breeds, even a tiny proportion of dogs being diagnosed seems to lead to recognition that whatever it is could be a problem, and should be monitored/tested for. But in others, things seem to be ignored. I was looking at Japanese chin for my project, since they’d improve the muzzle quicker than papillons, have drop ears, and have a quieter temperament, and thought I was on to a winner when I read on their club website that there are no recognised health issues. Then I read the KC health survey, and 30% of them die of heart problems. ‘So which is it?’ I’m thinking.

Any ideas when something should start being tested for? Opinions? Comparisons with breeds people here are into?

Your Dog’s REAL Age Isn’t What You Think It Is

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