Chances of a burglar targeting a house for a specific thing are incredibly remote. Or maybe they'd be casing your house in search of a rare cooking instrument.
Several pages back I mentioned the story of my father-in-law's condo being broken into and a bunch of pistols were stolen. The police believe that the handguns were actually the target of the theft. The next time you have appliances delivered to your house and installed, pay attention to the crew. It's not that someone is going to come in and see your 55" flat screen and return in a few days to steal it. It's that if they see you have a 55" flat screen, high-end appliances in your kitchen, nice furniture, well.... then you probably have a lot of smaller valuables that might be worth lifting.
It's not a majority of cases, but a significant percentage of burglars have been inside the house before the robbery, or have at least seen the inside. (That's anecdotal; there used to be a show on Discovery called "To Catch a Thief", hosted by two ex-burglars who are now in the business of home security. They used to stage break-ins on people's homes to show them how vulnerable they were, then install these super tricked out security systems. Anyhoo, I remember an episode where they were spouting off statistics about burglaries and mentioned something along these lines, and many of the scenarios they acted out on the show involved one of the burglars posing as a utility worker, or delivery man, and it was amazing how easy it was for them to gain access to the interior of the home for a quick reconnoiter, right there in the presence of the homeowner.)
A final note about the dog angle...... one of our dogs has severe separation anxiety (she's a rescue who spent the better part of the two years before we got her boarded at a vet hospital and 75% of her day was in a cage), so we can't leave them home when go out together. That means if we are both out, the dogs aren't home. I know the specifics of our situation are probably not common, but I don't have a hard time believing that the broad strokes (people and dogs gone at the same time) are fairly representative of many dog owners.