Ok, I just read your post in the lounge so I know a bit more now. What a lovely story! He looks very sweet in the video. The name Bam Bam suits him!
The alfalfa should be pretty enticing. As Scarlet said, he may not have been offered it before. He’s probably still just adjusting to his new environment.
I would try get him in to see a vet just for a general health check. They can check his teeth to see there are no issues. At 7 weeks I’m not sure it would have too many probs unless it was born with dental probs. I seem to remember lionheads can be prone to dental issues so you have to keep an eye on their teeth (as with all rabbits). I’m betting the former owner hasn’t taken him to a vet or even had the sex determined properly. I’m unsure if he is too young for shots etc – I wouldn’t think so but if anyone else knows…. All the same, it’s good to establish a relationship with a good vet now and get a clean bill of health for your bun.