Sorry for the length of this post,first off. We have two beautiful buns, Bindi and Bambi, both females, both little Lops. Bambi was almost 3 years. I found her in her usual spot, the second floor of her hutch, gone, a few days ago. She had passed sometime during the night. I’m still in shock and wondering what happened. Our bunnies were a bonded pair. They were extremely close. I moved them to our basement six months ago because we now have two German shepherd pups. Not good mix. The bunnies have been happy and healthy in our basement. I constructed a 6x 8 play pen with two hutches, carpeting etc for them. It really is a nice setup. They seemed to enjoy their own space. Bambi was the shy one, always hiding in the hutch. Bindi would chase her away from her food every morning, but Bambi would eventually return to eat together. Bambi was a sweetheart. Bindi is the troublemaker. They would run the house, resting in front of the fireplace and under the Christmas tree. when Bindi was spayed, she had a tough time and we had the separated the two to prevent injury. Bindi would not eat after surgery. Bambi would sit next to her hutch outside her cage and get as close as possible. I finally put them back together and Bindi perked up and recovered immediately. They were both depressed and stopped eating from being separated . I learned am important lesson not to separate two bonded bunnies . I usually checked on them, fed them 2-3 times daily . They kept each other company. Looking back, Bambi had not been coming out of her hutch first thing in the morning for feeding for maybe a week . I just figured she was letting Bindi eat first, as usual. I remember checking her weight ( seemed ok) and both food bowls were being eaten. She seemed to be pooping ok. I can’t believe that it might have only Bindi eating all they food, if Bambi wasnt feeling well and not eating. Another note is that Bambi slays had a little difficulty with messy poop but nothing major. I’m feeling extreme guilt for not seeing any signs , or paying more attention. I loved that bunny with all my heart. She was so loving. I don’t why she passed and I didn’t have the heart to do a necropsy . Was it a hair ball, GI stasis, tumor....??? She was laying down peacefully on her belly when I found her. I’m a 54 year old man and can’t believe how these little bunnies have touched my soul. They are beautiful, loving little creatures which relied on me for safety. And I feel like I failed.