I'd have to say that I prefer Azed's version, "O, no! King's scattered antelopes". The two possibilities are equally sound, but in the surface reading the present perfect tense ('has scattered') fits better with the exclamation than does the perfect tense ('scattered'). 'O, no! He's blasted it over the bar' is much more likely than 'O, no! He blasted it over the bar.'
The primary reference, Chambers, makes it clear that 'kongoni' is both the singular and the plural.