Inuzuka's sniffing ability? Where does it state that? As far as I'm aware that's just Hiruzen having an incredible sense of smell.
Naruto states Kakashi's sense of smell is greater than part 1 Kiba's, so it's possible for non-members of the Inuzuka clan to have an enhanced sense of smell.
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I'm honestly not sure how to take anything this new databook says until it's properly translated. I've heard things being translated one way, others claiming that's wrong(such as Hiruzen being more talented than Tobirama, but there's people who say that it's an incorrect translation), etc, etc. Once Viz translates it, I'll buy what's said in it, but until then I'm going to try and ignore it in discussions.