I’m so sorry for your loss.
I’ve lost two bunnies before my eyes, and it is so traumatic. I was the same… just replaying it over and over.
All I can say is it gets better with time. You did everything you could… when bunnies start to crash.. they crash. It sounds like something very serious was wrong, and as bunnies are prey animals, very serious problems often start out looking like something treatable.
In time you might like to share some memories or photos of Oliver here, to help remember him as his happy and healthy self. You might eventually like to make a photo book of him. When we lost Bunston, all I could think of at first were his final moments, and I was worried that would overtake the memory of the life he had with us. I started jotting down any happy memories of him whenever they came to mind, it really helped me. About 2 years later I finally was ready to put together a photo book of him.
It can also be hard to see bonded mates doing well with the loss of their mate, even though it brings guilt to feel that way (and the alternative… them sinking into deep depression is even worse). Bertha seemed to be totally unphased when Bunston passed, at first. But over time I started seeing the subtle evidence of sadness as the weeks went by. Remember that bunnies hide pain of all sorts…. you two can be a source of comfort to each other, even if it’s hard to tell. I’m sure she will appreciate some extra cuddles from you, and you can help each other heal. (I’ve cried with Bertha too many times now sadly, as she’s been widowed twice).
Hugs to you and (((Binky free Oliver))) <3
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.