I have and 11 years old female collie. I strongly recomended you a collie as your dog. Katty was the best thing for my father in his last years.
Collies are very swet an loyal with their family.
Katty had saved me when my house was invaded by one man one night last year. You will need a lot a time at the begining. Raise a puppy needs a great deal of attention. The first months will be terrible but it pays. I promise you, I can t image my life without Katty.