I am so sorry for your loss. It causes such deep pain to lose one of our little ones. When I had to put my 16 yr old Koko to sleep I felt that I had lost a child. One reason it hurts so bad is because there is not one blasted thing you can do to change the fact that they're gone. It does get better with time. When you feel up to it a new baby can fill a different place in your heart with joy. He can never replace Munchkin but he will be a wonderful comfort to you. Remember, animals do not fear death as humans do...maybe they know the secret to it all. Munchkin is waiting at the bridge thinking of what a good life you shared and smiling with gratitude for your final act of kindness towards him.
Take care.

RIP MUNCHKIN