Highly recommend this for any aging pet.  My 13 year old Lab was getting to a point where it was getting difficult for him to jump into back of my SUV because of his hips.  I didn't want to stress him in anyway and saw these steps.  As silly as they look (kind-of), I had to do it for my sweet boy.  It took a little getting use to at first and breaking in.  He still wanted to jump in, so I had to train him with treats...teaching him that the steps were the way to go now.  Well, in the evenings, I leave the back of the SUV open, and all 3 dogs will now use the steps with my Lab where they all love to just hang out with the old boy.  They think if they hang out long enough, they'll get to go for a ride.  These steps have been the best and I highly recommend them.  Even my chihuahua can even get into the back of the SUV now.  It's a family affair!