I think that animals are a lot more in tune to what's around them than we are. As they don't have conscious thought perhaps they're more senstitive? I don't think that it would be that they are seeing things as dogs have much poorer sight than we do, but 'sensing' things, in the same way that some dogs can predict epileptic fits and the like.. I'd never be surprised!

well are willow ,will all of a sudden , be in her bed ,then jump out ,and jump on to us ,all scared as if she has seen ,some think .that has freightened her . did say to oh maybe its .a dream from her past life . she has had a nightmare .but it dos make you wonder . i do think they are much more sensitive than us humans