Oh, please.
Common sense has to prevail. Don't force a dog to carry too much weight. But no weight? Dog packs should be illegal? "Man up"?
My dog goes berserk when I pull her pack down from the shelf. In a good way! It means she's going hiking--perhaps for several days. It's a saddlebag pack that weighs about 1.25 lbs. empty. Fully packed with her food, water, shelter, and ground stake it's about 8 lbs. She weighs a bit over 50 lbs. That's less than 1/6 of her body weight. Not a problem. She balks at getting in the truck without her pack if she sees me put my pack in. That says enough for me.