C&C per req:
The dog pictures share a couple of common issues. One is composition, the other is exposure. When shooting animals as with people, be at there eye-level and have them look into the camera. Generally a 3/4 profile works well for a sitting dog, and consider using portrati (vertical) orientation. Your exposure was problematic here because of the large bright sky behind the [relatively] dark face of the dog. Grab your camera's manual and read up on spot metering, and when faced with situations like this, consider using a flash to provide fill light or moving to a different area.
The first picture of your wife shares the above exposure issues. The bright light camera left has fooled the meter. You have a couple of choices, use a reflector to your right to redirect the window light toward her face, use a flash to provide fill light, or turn her around to take advantage of the light.
The last image is the strongest, but would be better if it were lesss centered and shot in portrait orientation.
Just my $00.02 worth - your mileage may vary.
~John