While some dogs are prone to laying around the house all day, some dogs get into some pretty interesting things if you follow them around. You may be distracting, but for the moments when you're not, you can surely capture some pretty great natural moments if you know how to be non-intrusive.
Dog reactions are some of the greatest things on Earth. If you don't believe us, just do a search for "dog reacts" and you'll quickly get the picture (pun intended). Try to capture your dog's best reactions by playing hide and seek, then snapping photos when they finally find you, or set up a situation in which you know will elicit a genuine response. You may be surprised how fantastic the photos turn out - that is, if you have a quick enough shutter speed and lens!