WOW! and it’s not your rabbit? Poor you! Poor bunny!!!!! Gee – I am actually lost for words (unlike me). This is a great site and I’m sure you will get lots of good advice. Sorry I can’t help out, I’ve had my bunny for 6 months and am a learner too. But because he is mine/family – I treat him as such. My kids were all different, and tolerated there behaviour patiently with accordance. I’m not suggesting that your not – please, sorry if this isn’t coming out right, but I do get it is different being a bunny sitter. How fantastic are you trying to make your relationship better. Good for you! How lucky is the bunny!

Welcome to BB! It sounds like you were put in a pet situation that you had not planned. I think it’s great that you’re here trying to to learn more about him. I’m going to jump right in and please don’t perceive any of my suggestions as criticism. I’m going to cover everything I can think of because I’m not sure what you’ve read yet or not. I’m sorry if any of this is double info for you.  

Is your bunny neutered? Peeing and pooping everywhere is a marking behavior that is amplified by sex hormones. If he has not been neutered this is something i would look into. Not all vets can treat rabbits as they are considered “exotic pets” so it’s important to find a rabbit savvy vet. I don’t think it’s realistic to expect an intact rabbit to be 100% litter box trained.
http://rabbit.org/faq-how-to-find-a-good-rabbit-vet/
http://rabbit.org/faq-spaying-and-neutering/

It also sounds like bunny proofing is in order. For some ideas on how to make your home bunny safe check out this article:
https://binkybunny.com/BUNNYINFO/tabid/53/CategoryID/8/PID/940/Default.aspx
You definitely don’t want him chewing on cords dummy or real. Making an area safe for a rabbit is much like making it safe for a toddler. If there’s something they CAN get into they likely will.

You want to make sure you’re feeding him correctly and he’s properly housed:
http://rabbit.org/faq-diet/
http://rabbit.org/suggested-vegetables-and-fruits-for-a-rabbit-diet/
http://rabbit.org/faq-housing/

I know this seems like a lot, especially for a pet that you did not intend to have, but doing these things will help out your rabbit and I think ease a lot of your frustrations. Rabbits are not cats or dogs and as prey animals they perceive the world differently. Being picked up is generally disliked because to them if feels like they’re getting scooped up by a predator. It’s also true that most rabbits dislike being held and snuggled. This doesn’t mean that you can’t pet them or interact with them on their level (on the floor). Rabbits aren’t stupid and can be trained. Many people clicker train their rabbits (like you do with dogs) and find it fun while helping their relationship with their rabbit.

Another website I really recommend is Language of Lagomorphs. It’s a great place that can help you learn how to understand your bunny a bit better:
http://language.rabbitspeak.com/

I hope some of this helped and you’re able to find a way to enjoy your new pet in spite of how he came into your life. Take a look around the forum you might find some more solutions to your issues or just general answers to “Why do you crazy people love bunnies so much?”. I also recommend checking out our monthly pic thread in the lounge section. It can show some of the ways people enjoy their bunnies. Please keep us posted on how things are going. 

Edited to add: Check out the Bunny Info tab too – https://binkybunny.com/BUNNYINFO…fault.aspx

I know I already gave you a bunch of links and hopefully I’ve not overwhelmed you! 

MoveDiagonally pretty much wrapped it up!

i have read that sometimes rabbits see electrical cords as roots or vines and are cutting them because they want to make sure they can escape if there is a threat. as they are a prey in nature. so i would keep an eye or electrical cords.
i have some “tunnels” that my bunny enjoys. you could try and put some sticks through a box to imitate a tunnel with some vines to keep him busy.

also i don’t know if he his a digger but a grass carpet or sea-grass carpet might help. also i would like to try a sand box for my bunny but i did not work on that idea. it might get enjoyed but i don’t want sand everywhere in my house haha.

for litter box training, if your rabbit is not neutered, it is pretty much why he is marking the place with his droppings. you could try putting them in his litter box but as long as he his not neutered i think the problem will persist. for the peeing on the couch it might be because the couch is strongly smelling like human. i think i read that some people are rubbing vinegar to help that. because other products only encourage this behavior -_-

well, hope that i could be of any help. Good luck with your new companion =)

I’m going to lock this thread because I don’t think it’s going to go anywhere positive.

Encosic – You’ve received a lot of helpful information but rabbits are not the right pets for everyone. My advice would be to surrender this rabbit to a rescue or shelter as it is seems to be a bad fit for you.