Five reels, twenty lines, and nothing hidden
The Dog House is a conventional machine and it does not pretend otherwise. Five reels, three rows, twenty fixed paylines running left to right. A win needs matching symbols on consecutive reels beginning with the first, sitting on one of those twenty defined patterns. No clusters, no counting, no cascades. If you have spent your evening on tumbling grids, this will feel like stepping back onto solid ground.
Because the lines are fixed you cannot deactivate any of them, which removes a decision that used to confuse players on older machines. Your only stake control is the total bet, and the machine divides it across the lines internally. Find that control, set it low, and leave it alone.
The demo balance is virtual. Nothing is deposited, nothing is owed, nothing can be withdrawn. That freedom is what makes it possible to run four hundred spins purely to observe how often the middle reels actually cooperate, which is exactly the kind of study nobody performs with real credit.