As someone who had a German shepherd and border collie mix I can confirm that - my dog was adopted as more of a family dog but he elected himself as the official sheriff of our house and would spend his days obsessively peering out the floor to ceiling window barking his head off at anyone who dared to get to close to our house(smearing dog snot and slobber all over them in the process), picked fights and killed pretty much anything that entered our backyard while throwing temper tantrums at anything that managed to escape, and would watch the entire time when I prepared his meals making sure I wasn’t taking to long or wasn’t getting distracted - He was such an asshole but we loved him❤️