Do you think dogs or cats can see spirits?

I used to live in a house that was built in 1901 my cats would lay at the end of my bed and out of no where just lift there heads up and stare at nothing it would freak me out I would yell at them I say lay down, go back to sleep ,put your head down stuff like that. they sit there and stare a little longer at nothing eventually stop curl up and sleep, Ive since moved and they havent done it in about 4yrs. freaky!!
 
Creepy, but I believe in this. When my dog (who's now in doggie heaven :heart:) came over to visit the apartment I lived in some years ago, I brought him down to the garden so he could go pee but he didn't want to move or go near that area. I remember feeling really creeped out!
 
omg you guys are totally scaring me. My dog does this all the time but since I live in an area where there are alot of outside noises I like to think she hears something I can't from out there.