Mmmm, lovely, poo in the bed!!
One of my labs is 12 1/2 and does have a few odd moments now and then. She is getting weak in her back legs, cant jump up into the truck anymore, and trots along rather than runs. She does get very upset now if I have visitors (not very often as I am an anti social old bird!) especially if they bring a dog. She will take herself off to the laundry room and lie there until they go. Its her escape pad!! I leave her be and let her do her own thing otherwise she gets really distressed. I think as they get older, certain things start to distress them, any change in the house will knock them for six. Have you changed, moved around anything in the house. Even changed their bedding in their beds. Little things seem to affect the old biddies more than the young ones. xx