Any changes on the food I would make slowly not to upset her stomach. And this story tears at my heart a bit. I would say have you friend the bunnysitter might wanna work up the courage to ask if she can adopt this little bunny from the negligent owner. If the owner doesn’t really care, maybe she will willingly give her up. I feel the bunnysitter would probably make a better home because she has you showing her how. Sorry if I’m not too much help but I thought I would throw that suggestion out there.

I would be careful. What happens if you give this bunny all this great stuff to eat and then it goes back to their owner and its healthy diet is abruptly stopped? Its diet should be changed slowly, so that would be a concern. By the time the rabbit is accustomed to the new diet, it will be time for it to go back. I agree with FrankieFlash. Try seeing if this person will let your friend keep the bunny. That way it will have a good home. If they don’t want to give it up, there isn’t much you can do.

I would avoid confrontation with the original owner so she does not get defensive. I would make the rabbit a super awesome home with a tunnel and some toys. I would buy them healthy pellets. I would dote all over that thing. After a couple months I would tell the old owner that I’ve really fallen in love with the bunny and offer or ask to take over ownership. Maybe even offer a premium if necessary.

I would perhaps even take the bunny to the vet. I would tell the owner that I was just paranoid, and that she didn’t have to pay me back. Vet prices can be a very large turn off for less committed bunny owners.

I’ve actually bun-napped both of my rabbits from the same sort of situations. Good luck!

I ditto what equal sign says. Maybe offer to reimburse the owner for the cage or something. So sad when owners dont care.

Maybe being “unburdened” for the next few months will allow the owner to realize she isn’t interested in the daily upkeep of a rabbit. But if not, she’s either going to want her bunny back, or if she gives up this one, there is nothing stopping her from buying another and continuing to provide inadequate care. This bun sounds like a sweetie, so I do hope your friend can keep her… but she needs to be upfront about it. And I would talk to the owner sooner rather than later. The sooner you know what is going on, the sooner you can begin to implement changes.