It doesn't seem crazy... the women in my family (my grandmother, my mother, my sister and I) all seem to have these abilities that the rest of the family doesn't. I have stories of things that have happened to me (and them) that you would never believe! My mother has it the most, she can actually hold an object of yours and tell you your whole life and the places you've been without ever having met you... she's freaked out a lot of my friends
My sister and I often feel presences, usually at the same time- she's living in this house right now, the house we grew up in, where there have been strange happenings all through the years. We know who is there, we've both seen the little girl but the man gets angry and makes a ruckus whe we move the upstairs furniture...
Anyway, my Dad is selling the house, but she is staying there for a few more weeks until she gets her new apartment, and she's been packing and there is all sorts of noise and stuff going on around there lately. boxes that were packed being unpacked, banging, doors slamming, footsteps, talking, you name it. We just hang out in the living room sometimes and we hear it all going on upstairs. Whoever is there does not like that she's been moving things and clearing out the house!
It just may be that your doggie senses a presence, but don't be scared, he's not there to hurt anyone. But if you are scared, tell it! That's what I do. Sometimes these things can scare me and I tell them so and I politely ask them to leave...You have to know, these ghosts think they still live there and you are in THEIR space. What I would do is speak out loud to it, the next time your dog starts barking at it, tell the ghost in a nice respectful yet firm way that he needs to go home, that please, he needs to go to the light. It will work. you might have to do it a few times, hopefully it will go away.
I really hope I don't sound crazy to you, I'm just so used to living with this stuff...I hope your "houseguest" gets the picture and leaves..