First of all, what you are expecting is completely normal.

And now I will explain why..

Rabbits are prey animals, as such, they apprehensive, anxious, and defensive. When you bring them to a new place and you are a novel person in their life, they are likely to be distrustful and scared. You have to make them feel comfortable with you and build trust. To do that, you have to show, through behavior, that you are not going to harm them or put them at risk.

To do that, you must let them come out on their terms. Don’t worry, through time and effort, this will occur. Especially since I have found rabbits to be very curious animals. Open the cage and let them come out on their terms. Don’t force them out, don’t push them. When you first get them and bring them home. You shouldn’t interact with them, give them time to settle in and let them feel safe in their cage. If you keep going up to the cage to bring them out, they will naturally feel threatened and not want to come. Continue to feed them by hand treats and if they grab and run back into cage to eat it, thats totally fine. When you have the time. Open the cage and sit around or near it and do you work. Leave them alone while you watch TV, read a book, do work, complete homework or whatever. Show that you are not caring and they will eventually come and and check you out.

Is your bun neutered or spayed. If he/she isn’t then you cannot truly litter train yet. Once you can get the procedure done, you can officially litter train her. However, if you wish to begin pairing the habits. LOok at the corner that she goes in. Typically rabbits will go in the corner. Put the litter box in that corner. Put some hay in the box because they like to munch ad poop too. If you can catch them mid act, try to bring her into the litter box. If she has accidents outside, don’t fully clean it up, put some of the soiled paper into the litter box or throw some poop in there. The point is that she can see this is where it supposedly goes. If she goes properly, give her a treat!

where is the cardboard box? Is it in the corner? I’ve heard of ppl using multiple boxes to catch the pee and poop. You can put some of the hay in the box, i’m not sure you need to put the pellets in the box as well. I am assuming you have the pellets in the dish? I can be wrong but i’ve only seen my bunny poop while eating hay, but not pellets? Plus, she inhales the pellets so fast its not really an issue. With hay, she hangs out in the litter box and munches on it and when she leaves there is a pile of poops

as far as spaying goes, i’m not sure of when, you’d have to check the websites such as the HRS website http://www.rabbit.org for some info or someone here will provide you with more accurate info. I wasn’t able to get my bunny spayed until she was after a year old.

Was she eating pellets when you got her or is this new to her?