Thanks for this update Sas !!
It is sad not really knowing what caused the death of your sweeties ... . In fact , I am not sure about my Sydney too : I know he had cardiomyopathy too , but I am not 100 % sure if this is what caused his sudden death ... .
But , I chose not to let him examine after his death ; it wouldn't bring him back ..

I hope you can start going on with your life now . It won't be easy , but with the help of Miley and of course all Pettalkers , you will manage !! I know how much everybody helped me to cope with the loss of Sydney . It still hurts thinking of him , but my two new cats do everything they can to keep mommy busy !!
A new kitten , is the best way to do !! I KNOW !!!