I am wondering if it is possible for dogs to hallucinate or something. One of my dogs, Elsa, seems to bark at nothing. She’ll bark at a wall (our walls are solid cement so mice in the walls isn’t a possibility), or she’ll bark at the hallway. There are also times she’ll jump at nothing but acts like there is something there. I’ll look for a fly, or a ball, anything in the direction that she is barking – nothing. What is also funny is she yaps like she is talking to someone/thing. We joke that she is talking to her imaginary friend or a ghost.
Is this normal? Can she be seeing things?