Hi, as many of you know I have posted here before about our pup's constant and excessive 'play' biting. He is 4 and a half months old now; it is not improving but getting worse. One behaviourist said it was borne out of frustration but it doesnt seem to be - he starts as soon as he wakes up!
Is there anyway a clicker could be used to train him not to do it?

Thanks for any advice. He picks most other things up very quickly, both clicker oriented and non clicker oriented.