Here's everything I could find in the blog regarding dogs (another thing that's been nagging at me.)
Day 25
"It has been hard to understand why our big dog, Tessi (she is a 160 lb. Newfoundland, a Landseer), has never reacted to any of the noises that the stalker has made. The only time she barks or goes crazy is if she actually hears someone knock on the front door – which the stalker does not do. Morgan’s puppy is too young and has never barked or growled yet."
http://morganingram.com/wordpress/?p=784
Day 41
"I am woken at 1:45 by our dog Tessi. She has started to bark at the front door. She barks occasionally, but snores loudly far more often. I feel that if Tessi is barking it is something...Tessi is upset about something outside..."
http://morganingram.com/wordpress/?p=1086
Day 42
"Sammy, our neighbors dog was always barking around the time our motion lights, outside Morgan’s room would go off, he was very protective and alert..."
http://morganingram.com/wordpress/?p=1096
Day 47
"She was home shortly after that and we were lying in bed when our neighbor Rhonda called at 11:48pm. She had seen Morgan’s motion light go on, and her little dog was barking at that side of the house."
"But there were the motion lights Rhonda saw, and then lights that I saw go on. Rhonda’s dog had been barking, and Steve decided that in the future that will be enough."
http://morganingram.com/wordpress/?p=1194
So it sounds as though the Ingram's dogs were not reliable barkers. I've had 4 dogs in my adult life, varying breeds, and have never experienced one who wouldn't bark at a stranger in the yard, on the porch, or coming into the house. They've never been trained. But I accept that there are probably dogs out there who wouldn't bark, and the Ingram's had two with laid back dispositions. I've never experienced it, but I get it.
But seems the neighbor's dog was a reliable barker. Did he bark on the night Morgan died? Did the neighbor notice other times when the dog was barking and the Ingrams weren't home, when the intruder possibly entered their home?
Something about the presence of 3 dogs between their home and the neighbor's home, not one of which seems to have alerted on the night Morgan died, is bugging me (with regards to the theory that the stalker ever entered the home or lurked around outside on a regular basis.)
Also, if Tessi barks when someone's at the door, did she bark when the stalker was on the porch? Or the time he was punching the code into the keypad?