I have a 13 yr. old Labrador with arthritis in his rear hips/legs. He gets around fairly well and up until a month ago would jump into the car as long as I could find a neighbor to stand with me at the opened car door. His only outing is going to the vet every other week for a shot and once a month for acupuncture. He can't be walked and get overheated due to surgery 2 yrs. ago for laryngeal paralysis, so he gets super excited knowing we are leaving the house. However, once I approach the car, he freezes, puts on his "brakes", and refuses to go any further. I bought a ramp, a step, coaxing him with a treat, but no luck. My car sits very low to the ground so I can't figure his sudden hesitation. I don't have any help, and he weighs 86 lbs. I just had my vet prescribe something to relax his muscles so I hope that will help, but I could sure use some advice from someone!!