Well, to prolong his going up and down stairs, keep him in shape!-Well, if he's a greyhound/GSD mix, I'm sure you walk him every day!

I was looking in a magazine (Doctors Fostor and Smith) and I found a ComfortLift Carrier. Here is a website for you: http://www.drsfostersmith.com/produc...&N=2001+113678

(if the website does not work, just go to google and type comfortlift carrier dogs, and it is the 2nd selection!)

Good luck!-Steph and Jes