I'm in favor of dog boots.
Yes, dog paws were made for the outdoors......but trails are not the same as "the outdoors." They are artificially hardened, get hotter than the ground due to lack of vegetation. Not to mention that your dog's paws are not likely not accustomed to such issues unless they have been conditioned already. Kind of like soft hands vs working hands.
Additionally, they help keep burs out of their paws, reduce fatigue, and prevent injury from rocks, or heat....all of which can make a nice hike into a nightmare.
Now, if I just go into the woods, no boots. But if I'm truly hiking, they get boots because I don't want to have to pack them out.
Mine are Ruffwear, and they are nicely made.
I also have a pack for my Akita so that he can carry his own water and bowl so I don't have to.
And the first bit while they are figuring out how to walk in boots.....fucking hilarious.