My 9 month old dalamation PUppy chews everything, soks,rubbish even my mobil phone. We give him fresh bones everyday he gets 3 hours exersise per day and he has an unlimited amont of toy wich we alternate so he dosnt get bored. He has Kongs, bisciut boxs, rope toys , nylone bones. He also goes to weekly training sessions plus I spend 30 mins on him twice a day so Why cant he stop chewing? I know hes teething and we had his moth chescked a week ago. No other pup has done this before.
This puppy behavior will probablt stop in time. You are doing everything I can think of, just do not give him access too anything to chew on but his toys etc... vetcare