I think it would all depend on the pup, the surface being walked on and the stress of the walk.
If Draco is showing no adverse reactions to walking that far, I'd continue....but realize that you are building his tolerant level...LOL!
Hondo Von Dopplet L Bauernhof "Hondo"- GSD
Lilie's Tug McGraw "Tug" - Golden Retriever
Maggie - Mini Dachshund (Rescue)
Lonestar Pivo - Texas Blue Lacy
Ashe - Barn Cat
Katie / APHA