I need closure over the loss of my dog?

It is natural to grieve when you lose a family memeber like a dog. They are a huge part of our lives. I unnderstand you feel upset beacuse you didn't get to say goodbye but i sure you would want her to have suffered more than she had to even for a short time. Just beacuse you didn't get to hug her goodbye doesn't mean she didn't know how much you loved her. She is at peace now. It can help to have a little ceremony like the family getting together in the garden and planting a plant like rose and say a few words. It has only be a few days so it will take time but i pronise that you will be able to rememeber the good times you had with her. As for your other dog it is natural she will miss her friend but just make sure she gets plenty of love and walks and she will get used to be without her. It maybe as a family you decide you would like another dog but don't rush that everyone needs to be ready as a new puppy or dog should always come into a happy home not a sad one. And i am sorry for your lose.