i have a jack russell his been acting weird latetly when we come back from running he goes to the closet then when i get closer he growls at me mmmm....that weird sometimes i take him out twice a day he still does that, also i give him some attention then when were done playing around he goes to my parents closet and the same thing happen he growls at me, why is this happening?

Hi. Does your jack have a space for him, example a kennle ? Cause it sounds like he is using the closet for his own space. How old is your Jack ?