Can they start on greens at 6 weeks?At 6 months, bun is definitely old enough to be slowly introduced to greens. The following link to a page on my website explains how to go about the process of introducing, and has a starter list of what greens are safe for daily use and which should be limited.
The idea is to start slowly and with only one type at a time. The link explains in more detail:
Knowing the age of your rabbit will be most useful to you for knowing what to feed, etc. If you can post a current photo (with something in photo to show size perspective) then experienced members may be able to approximate age if it is still weeks young. I'd suggest starting a new thread to post the photo and ask about age.The vet said the injury is older than 5 weeks but I thought he was 5 weeks old.