Our 170 lb Newfoundland has hip dysplasia. We had traveled with him in the past but now he will not be able to climb the pet ramp to ride in our Supper Crew truck. We are treating his condition with t...
You can also temporarily use one of the cloth grocery bags for a sling. Just cut the sides out and lift with the handles. We had a Webmaster harness from Ruffwear for our Tripawd, Murphy. Not sure what their largest size is, but you might check them out. Good quality product. Another brand I've heard good reports on is the Help 'em Up harness.
EDIT: I just checked the Webmaster page, and it looks like thise won't be big enough. The Help'em Up has a size that fits up to 220 pounds, though.