I have a 9 year old Bichon Frise rescued from a backyard breeder situation when she was 8. She has settled in well, very tolerant of family life etc considering where she has come from. She seems to have started having nightmares she does the normal doggy dreaming twitches etc but sometimes quite ferociously and accompanied by either growling or whimpering and when she wakes up she either stands there head and tail down looking scared or she slinks around the room keeping right to the edge of the room again head and tail down and tries to get behind the sofa, she never goes behind there normally. Should I take her to the vet? I'm concerned if her dreams are scaring her she might snap at the kids if they happen to be in the wrong place at the wrong time.