User blog comment:UltraMegaDude/Giga and Krito confirmed./@comment-6025261-20171215024614/@comment-161.77.42.190-20180604140105

You're right. Giga may have broken small bones, but its teeth were designed to slice through flesh, hide and muscle like paper. Its bite would have taken huge chunks out of prey, inducing shock and blood loss, and immoblizing the victim. If the prey didn't already die of shock and blood loss, the Giga would then easily find it and deliver the final, annihilating bite.