I have five dogs in my house. Three are Akitas. One of the akitas is a female an is in heat. I have my three akitas separated, they dont see each other. All my dogs behave great except the old Akita. I leave him in the yard during the day he starts whining or howling. If I bring him inside the house, to my room he opens the doors! I walk him 30 minutes a day, and dont know what else to do. Please help!