Complex sentence: The large bill of other species like Bullockornis and Dromornis indicates a carnivourous lifestyle while the gizards and amino acid analysis of the eggs of Genyornis indicates a herbivourous lifestyal, but as yet the diet of this genera is in debate.
Split into simpler sentences: The large bill of other species like Bullockornis and Dromornis indicates a carnivourous lifestyle while the gizzards and amino acid analysis of the eggs of Genyornis indicates a herbivourous lifestyal. But as yet the diet of this genera is in debate.