When my husband gets out of his chair in his office after sitting for some time, CorgiBear jumps up and barks aggressively and "yells" at him. Why? She knows this behavior is not good because my husband tells her to stop and no, and she still "yells" at him, and than runs to her crate, her safe zone where she likes to sleep. She does this "yelling" agressive barking at me when he drives up in the driveway, and is at the front door wanting to be let out to see daddy, she yells at me when I won't open the door to let her out. What is this behavior? She barks aggressively and has snarled at us. We tell her NO but she continues.