So our little girl bunny Jax has a pretty sweet life. She is indoors at night and during rainy days and all winter. (We live in northern Alberta and its just too cold for a mini rex here) She however does have a crazy awesome large rabbit hutch for outside and it sits inside a big homemade cage that’s the side of a medium dog cage (husband is a carpenter and made it) It large enough a few adults can go in and sit and hang out with her. So she’s afforded tons of exercise and can do all things bunnies love…dig, eat fresh grass, clover etc all summer long 
So also dug herself a den…Its massive I’m not sure how big it is but a long time ago I did send my arm in there with my cell phone recording and the flashlight function on and its pretty cool, I got up to my shoulder and couldn’t go any further …I tried to measure the length with something smaller and she’s got quite the elaborate little tunnel going on thats at least 3 meters long last I measured it.
The other day she traded digging for gathering grass and bringing it down. And she’s been frantically doing this for hours and hours the last two days. So is she stashing up grass for winter? lol Tonight while inside the house and running around she started gathering for of my knitting yarn up and was looking around for a place to stash it. So something this triggering in her I’m wondering if it is because its getting slowly cooler up here in the north and she’s just instictively getting ready. And if so soon she wont have her spoiled outdoor area to go to, so what can you peeps suggest I construct for her inside to mimick her outside dug den. She really loves spending most of her time on it. I was thinking getting a bunch of cardboard and constructing tunnels and a make shift den out of that.
She’s going to likely be so crushed once the cold of winter comes and she’s inside all the time so I want to have things that hopefully she can enjoy doing like she does outside.
Little info on her incase its relivant. She’s approx 7-8 months now, not spay and a only bunny