I used to have a black rabbit who was healthy and young, at least to my knowledge. I’m not sure what kind she was, but she was fairly large. One day, she got sick and suddenly passed. After a year and a half, I still don’t know what caused it and how I could’ve prevented it. To give some background, the second week of January 2018 I got her from a family who could no longer keep her because of their baby’s allergies. The original owner was unsure of her age but said she was around 1 and a half years old. While I had her, she was super active and had a diverse diet. She’d get hay and grain daily with a rotation of fruits and veggies every morning and night. She had a three story wooden cage that she’d occasionally bite at, despite how many times I tried to get her to stop. It didn’t look like she ate the pieces as I was always throwing them out, or at least didn’t eat most of them. Anyway, the month of September 2018 I relapsed with depression and my motivation sucked. I gave her kale more often with a side fruit or veggie to compliment it. It was the easiest thing for me to get and prepare for her. The morning of September 18, I got ready for school and fed her kale and strawberries and carrots. Her food and water was in the middle level and her litter bin on the bottom level. She didn’t run up to the cage door as she normally would. Thinking nothing of it, I left. When I returned, I was super tired from school and immediately passed out. Before getting in bed, I walked up to her cage and noticed that she hadn’t ate anything. I didn’t wake up until 7 p.m. that day and threw out her breakfast to feed her dinner. Again, she didn’t approach me which was the normal routine. Now concerned, I told my mom back when I was living there and she too was worried, but didn’t think it was serious so we didn’t make a trip to the vet. For the rest of the night she laid next to her bed on the top level, barely moving. I put her water and food up there with her and as much as I tried to get her to move, she refused. She didn’t go to the bathroom or eat or drink anything even when it was right in front of her. I stayed up until 3:30 a.m. before I accidentally fell asleep. Right before I fell asleep, I checked up on her periodically and she was the same; no movement, just breathing. My mom came in three hours later at 6:30 a.m. to check on her and wake me up. That’s where we found her on the bottom of her cage, laying against the side as if she was sleeping. She wasn’t stiff or cold, and she felt and looked just like she was relaxing. After shaking her over and over, she didn’t move, and when we picked her up to put her into her bed for cremation, urine came out. I never really got to know if it was a blockage from something like the wood cage, if she had too much kale and colic, if she was actually old (which I don’t really think), or what. Regardless, it was super sudden. After finally trying to do some research, I saw that rigor mortis lasts for hours? Between the 3 hours, would it be possible for it to go away? When I felt her for the last time, she was soft and limp. After all this reading some part of me fears that she wasn’t gone when I saw her. I know it’s kinda crazy because she wasn’t waking up and the pee that came out when moved but she felt so normal that, thinking back on it, I have no idea what to think anymore. Anyway, sorry for the super long passage but please if anyone has any insight or any experience like this it would help so much. We didn’t take her to the vet or get an autopsy so I’m so scared that it was my fault and never truly stopped blaming myself. I got another bunny in March of 2020 and she’s turning one soon. She has a plastic cage and only eats grain and hay as she doesn’t show much interest in anything else I’ve tried so I’m not too worried about something similar happening but it still does concern me.