Can you hunt the prey for a lioness or satisfy the hunger of young lions
Hitherto God had put such questions to Job as were proper to convince him of his ignorance and short-sightedness. Now he comes, in the same manner, to show his impotency and weakness. As it is but little that he knows, and therefore he ought not to arraign the divine counsels, so it is but little that he can do, and therefore he ought not to oppose the proceedings of Providence.
Commenting on Job 38:25-41
At Job 38:39-39:30, the instincts of animals. Is it thou that givest it the instinct to hunt its prey? (Psa 104:21). appetite--literally, "life," which depends on the appetite" (Job 33:20).
Wilt thou hunt the prey for the lion? or fill the appetite of the young lions, (a) After he had declared God's works in the heavens, he shows his marvellous providence in earth, even toward the brute beasts.