1.  Beach Towel (home made)
2.  Snow Scoop 
3.  Lift-N-Aid



Available at 
Improvements Catalog
   item # 135863   56" long  28" wide
Clean Air Gardening
I would add 2 more wheels for stability, and a rope at the handholds.
Roll to vehicle, put one end into car, slide unit with dog on it, onto the seat.
Secure with seat belts...and off to the Vet !


  Bottoms Up Leash     


  Lift and Aid