[Brian]

I think snakes and all vertebrate animals feel pain at least. I don't think they have feelings in the way that we understand feelings but I could be wrong.
They seem to have personalities at times but at other times they just seem to be doing what they need to do to survive. I definately wouldn't compare their conciousness to that of dogs. Dogs definately seem to have feelings but then they have voice and body language to show us their feelings whereas snakes can't even wink.