Have a 11 month old german shepard i take him for a walk in the morning and a run in the afternoon he has plenty of toys and a big yard and swap the toys around so he is never bored but once a week he goes missing and you call his name and whistle and appear at the front door few minutes later he has been desexed i just cant figure out why he does it and another thing if you raise your voice or if he knows he has done soemthing wrong he just pisses himself sometimes you dont even need to say a word just look at him and he wets himself i picked him up abandoned and abused how can i get him out of that habit