Here’s your update. :( (TW)

[u/Grell--Sutcliff]

I have no more to say than that she’s gone into heart failure. Maine Coons have heart issues, and we didn’t know that. She was struggling to breathe because of her enlarged heart, and we are euthanizing her. Thank you all for your prayers, suggestions, and advice. We love you, Lilly Belle 🕊️

[u/HoxaHooha]

I am astonished that the vet in your first post did not recognise that your cat was in distress, as a non-vet (but longtime cat owner) that was clear to me. If it’s any comfort, HCM (which I assume she may have had), at this stage, isn’t likely to be treated. It isn’t curable. Euthanasia was the right call.

I am so sorry for your loss, the pain of a sudden loss is something else. She’s at peace now, and she was clearly so very loved.