Thanks aliceandlouis, I'm sure Barnaby is very anxious, he only seems relaxed when fast asleep. He is very active during the night and when he sleeps during the day he rarely lies flat out, looking relaxed. At the vet yesterday, no real ideas about the dementia but he has said he has given Prozac to a couple of anxious dogs; not sure about that! He took bloods to check for underlying issues. Not all results in but he has said that B's liver values are high; an ultrasound would reveal the cause if we want to go down that route. Have ordered some nappies and some non slip boots this evening to relieve the symptoms if not the cause. I will check out the Adaptil collar idea, thanks again.