Is it normal my dog keeps barking at something behind me ?
Recently my dog is getting weird. He sometimes faces the empty wall and keeps barking at nothing. Last night, I woke up to use the bathroom, he appeared in the hallway and stared at me for a whole minute long, but then I realized he didn't look at me, he looked at something behind me. It freaked the crap out of me. I turned my head to look over my shoulder and saw nothing. Then suddently, the dog barked loudly like it saw something horrifying. I felt like my heart stopped beating for a moment. I had to wake the whole family up in case someone had broken into my house. but we found nobody else in the house except the family members. I try not to think about something non human existing in my house but there are no other explanations. Is my dog crazy ?