There are other questions around this issue, but I'd like to ask about specific circumstances, so it's not a duplicate.
My dog hates to stay home alone. My wife thinks this is separation anxiety, but I'm not sure. For example, it seems like it's not the need to be with us her owners, but more like the need to be with anyone. If we leave her at a friends house who also have a dog, she's fine. If I leave her at my parents', she's fine. But if we leave her alone at home, she really hates it.
The symptoms: we left a camera running and filmed her behavior when left alone. We leave her alone with a Kong treat, so she's ok when we leave, but one or two minutes later (even before she's done with the treat), she starts wandering around the house and whining. She goes from the door to the window whining. After a while she gets back to her treat or goes to sleep, but then every so often again she starts wandering and whining. Recently she defecates in the house a lot but only when we're gone, even if she did it in the morning walk just a few hours earlier. She also tries opening doors in the house and sometimes ruins stuff she can get her paws on.
When we're home, sometimes she likes being with us in the same room, but not always. She spends quite some time sleeping by herself in another room or on her bed. When we take her out to the park, she doesn't stay too close to us, sometimes she even runs so far that she can't see us and doesn't come right away when we call her.
So I'm trying to figure if this is separation anxiety or just boredom, or something in between, and any advice on how to treat this will be appreciated. We really have a hard time when we know she has to stay home alone.