Fortunately shredded pads hardly ever represent a threat to him other than passing some paper or plastic in his stool.
Here are some things to try:
Other steps you can take that may help is using a covered cage (it will still take several days to adapt), having the cage in an area where he does not see or hear you and using interactive chew toys such as Starmark Everlasting Treat, Kong Quest or Traxx, Nylabone Romp n Chomp or processed bones or antlers (Blue Buffalo). Having music or a ticking clock can also help. Preferably the cage is near but not in the same room where frequent family activities occur. The most reliable solution is a second puppy but if that is not feasible try these other suggestions.