My puppy doesn't want to walk
We hae a 4 month old puppy, we just got him 2 week ago. Lab mix
He is very active and so far has liked the walks, with no major problem on the leash.
Since yesterday he doesn't want to walk anymore and he just puts the brakes on and doesn't move.
It caught us a little bit un prepared for that because he has just been extremely obedient and sweet, walking by our side and not pulling too much.
We have been doing long walks, maybe 2 hour a day.
Would that mean he is tired? It's a discipline problem?
I don't want to pull him, definitely, but what would be a good solution?