Thank you to everyone who responded. I decided to take him to the vet because I was so horrified of what might happen to my baby. Sadly my Bun did not make it. I have never experienced the loss of something I loved sooo much and I can honestly say that I have never felt an emotion like the one I am going through. I regret taking him to the vet, and I feel like this is all my fault. I loved him more than anything, and the only reason I took to get neutered to begin with was because supposedly all the benefits were amazing but if I would’ve known he would died from it I would’ve never taken him. The vet I took him to even told me that they had never had a rabbit pass from the procedure, and knowing that my rabbit was the “first” makes me question if they were lying to me, but this also makes me so upset. I at least find minimal comfort in knowing that he is no longer in pain, but I’m not sure this hole in my heart will be filled anytime soon.