How can you move your large sick dog?

Just like you would move a human. If you have something solid like plywood long and wide enough for your dog, put a blanket on it and have someone else help you restrain the dog. It's important to keep the dog as immobile as you can. To lift the dog onto the plywood put the dog on another blanket and you and someone else each take one end of the blanket while a third person holds the dog still in the blanket (the dog won't like the sensation) and use it to put the dog on the plywood. Once you have done that it's going to take 3 people to get the dog into the car or truck. Two to carry the dog out and one to hold the dog down while transporting to the vets. If it's the dog's front legs then you can lift the dog up by cupping your arms under butt and also under their chest.