All pads are soft until they toughen them up by running around outside. Until then, I would limit the time he spends walking on concrete and asphalt. My puppy's first summer (I brought him home Memorial Day weekend 2 years ago), his paws were soft and quite sensitive to heat, etc. Now, they're hard and rough. I think it took some months to toughen them up: he would chase the ball and briefly run across asphalt on our drive and even just the ground outside helped.
Xan Varik von Fernheim (born 4/3/13)