i have 2 year old beddy whippet that i've had for about 6 months, he's is a well behaved quiet dog who loves his ferreting and lamping, he has been the perfect companion and have not had any problems at all......however, for the last three evenings, he has displayed some very odd behaviour, during the day he is his normal self, he works well, sleeps, eats, shits and plays all day and usually falls asleep in front of the fire, then, sometime during the evening, he will sit up and gaze around the room with his ears half cocked and start fidgeting, he seems to be following something around the ro