Hello all! I’ve had my wee bunny for about 2 months now, shes about a year and a half old. We got her from a family that had several other pets, including dogs, other bunnies, weasels, mice, rats, etc. We originally got her for my god daughter, but she was allergic to her, so i brought her in my room where she’s been content ever since.
Now onto my concern, i just changed my bunnies litter and “pooh pan” and put in this new stuff that was recommended to me by one of the PetSmart employees, but she hasn’t tried to explore like she normally does when I’ve changed it before. She just sits on her “pooh pan” rapidly sniffing the air, she’s been doing this for 3 hours almost. So i figured I’d let her out of her cage and let her roam around on my bed, see if that’d calm her down, but it didn’t. She won’t go inside her little cave thing, she won’t drink, she won’t eat, not even her favorite treats will budge her. When i put her back in the cage after i thought she had called down, she started freaking out. She would kick the new litter, almost like a dog trying to kick off snow built up between their paws, then jump straight onto her pooh pan and just sit there. Why is my bunny acting like this? I’m worried i pissed her off or worse, hurt her.
This is her still just sitting there. You can see her alfalfa cubes, apple word sticks, chew for her teeth, and the new litter. And below is a picture of the bag of new litter

Update: my bunny, Penny, is doing well. We changed her litter back to the fluffy white stuff lol. She’s much more relaxed and is eating and drinking normally. Thank you all for the advice, muchly appreciated