Can spirits possess animals?


Yes, is the simple answer; generally speaking they’ll do so if the animal is mentally weakened (or to a lesser extent physical, but only up to a minor extent) and the reason can be varied. I do need to point out though, that this is generally speaking rare- being possessed in the above manner that is.

See this interesting article:

Also see this video as well as the videos below it for 2 cases I cover through mind-delving.