Under these circumstances, dealing objectively with what to do next presents a sadly daunting challenge. Better that we investigate our options before that sad day comes. If the death occurs at the veterinarian's office, we often leave the physical remains with the veterinarian. A necropsy may be performed to determine the cause of death, especially important in multi-bunny households and foster homes to insure a communicable disease wasn't the culprit. Sometimes we just need to know why, especially when the death came swiftly and without warning.
Healing can begin with an understanding of why.
And especially the comfort of knowing our rabbit's death wasn't something we could have prevented. If it was, we can learn from our mistakes and provide a better home for our next rabbit. At the veterinarian's office, suffering from shock and grief, we usually don't delve deeply into how our pet's remains are disposed of. For those of us comfortable with recycling, a service is available that serves that purpose. The remains of our friend join other companion pets whose bodies are recycled into commercial products.