As Mick mentions in his comment, "to deem in good shape" is somewhat outdated-fashioned but not, I think, enough that you should not learn the way to make use of the idiom. I would not phone it "Victorian" English, as it's a phrase that sees normal use even these days. https://rylanjrzfk.articlesblogger.com/59036846/new-step-by-step-map-for-cat-grooming-uae