The fifth plague falls upon the Egyptian livestock. Yahweh inflicts a heavy plague upon cattle, horses, sheep, goats, camels, and asses. “And Yahweh did this thing on the next day. And all Egypt’s cattle died” (9:6).
Yet later on in the same narrative, there is mention of cattle. In 9:18-25 the text speaks of cattle being struck by Yahweh’s seventh deed, hail; in 10:25 it is implied that the Egyptians will provide the Israelites with sacrificial animals; in 11:5 the cattle are also present only to die again to the plague inflicting all the first born; and finally in 14:28 and following, the Egyptians pursue the Israelites with horse-driven chariots, which die a second death in the sea.
It is quite possible that the plague narrative may have originated as separate stories, each with its own plague, and then later combined together. At any event, it is clear that our author has a penchant for exaggeration.