This is our Disney dog.
He lived with my mum until he died at the age of 15 in August, 2000.
Disney had degenerative myelopathy, which means his back legs were paralyzed,
so we got him a cart so he could walk around again. 
It was only moderately successful, as we didn't find out about this until he was already very weak.
However, for the few weeks that he could get up and get around like a real dog,
it was truly worth it!

Three websites that have excellent information and prices on carts for dogs and other animals are:

www.eddieswheels.com
www.k9carts.com
www.dogmobile.uk.com

This is Disney in his SleePee Time Bed.
We bought him this bed as he suffered from occasional incontinence, particularly when he was excited.
We usually put him in it whenever whenever we had to go out.
It has a tray under it to catch the urine, so clean-up is a snap.
You can find out more about these beds at www.sleepeetime.com.