Thank you for writing.
Carnivorous animals eat other animals because we live in a fallen and corrupted world. We are not told anything about how this started, but it appears to be after the flood, for nothing is mentioned about it before.
Such a state was never a part of God’s creation intent, nor is it part of His heavenly will, where there is no pain or death.
And, just because some animals eat other animals it is not excuse for humans to do so.
We hope this helps.
In the Love of the Lord,
Frank and Mary