Ok so, I am moving back to Pa to live with my parents. We have an 11 year old cocker spaniel, named Paws who can be slightly dog aggressive.

What would be the best way to introduce them since they will be living together?

Maybe help them experience good things from their first meeting. You may also let them sniff each other for a moment which is a common canine greeting manner. It will also help if you greet them with a friendly tone...

Give them a better introduction...because first impressions last right...

if you can post some pictures, that'd be great.

11 year old dog? Thats an old dog

[wishbone]

Think of good event for the dogs. If they have issues of aggressiveness, first give them something belongs to the other for them to sniff and be familiarized with the smell. Introducing them by playing with them together, don't forget the treats.