He looks healthy to me. General rule of thumb is yearlings get fed every 5 days. You can keep the prey size up and stay on medium rats. See how he does with just one. If he still seems hungry right after the first, offer a second. He might be a 1-2 rat/week snake and he's growing so eating that much is fine. I had a bp that ate 2 small rats one week then 1 rat every other week before he was big enough to take 2 mediums every week. It's what/how he ate, now he downs 1 large a week or 3-5 ASFs.
Edit: Good point by Cptjack with "cruising around".