I was playing with apature still not sure what it does on the photo but thought this kidna looked funny... I had th4e iso up to high so it got some noise I didnt even know so thats the sad thing...
Your apature effects the deapth of field. See how the dog's bottom half is blurry? A bigger numbered apature would have resulted in the whole dog being in focus.
For what it's worth - nice use of apature. Having just his cute ol' head in focus makes it a nicer shot.