Researches in Hungary have gotten together to do a study, and consequently to bring us all some devstating news; apparently, just like many of us, dogs lie awake at night thinking about their problems after a stressful and/or emotional day. Yep... I know. I. am. absolutely. CRUSHED.
The researchers eventually found that after a three-hour nap, all the dogs who were subjected to the stressful experience had had the worst sleep. They basically spent an avaergae of around 20 more minutes in REM (which is the active sleep stage characterized by vivid dreaming and an increased heart rate) when compared to the dogs who had expeirenced the positive day. The stressed out dogs also ended waking up a lot more quickly than their more relaxed counterparts.