I am so sorry. I recently lost my boy in Apri and I would have done anything, anything to keep him here with me. Your beautiful baby is in my thoughts.
Oh Jenn I'm so sorry. I have no words, I cannot even IMAGINE what you are going through right now. I'm actually welling up as I write this.
Just do your best to spend as much time as you can with your beloved Mercedes, make her feel as comfortable and loved as possible and be there for her.
Poor baby...
My heart goes out to you, your DH and other pups...