What a TERRIFIC topic for discussion.
For me, the biggest problem (capturing candid photos in/around the house) is with distracting elements that notoriously appear in the background. It seems the animals do the 'cutest' and most picture-worthy things when they are in close proximity to some large piece of furniture.
Combine that with the effect of an 'automatic' camera and its choice of when to use a flash and I often get shots with the corner of a table BLARING white in the edge of the frame. Many times even cropping is not enough, so I resort to image editing (mask the offending area and either burn or blur it).
Dodging and Burning are two techniques I had mastered back in Pre-Historic times with celluloid photography/printing. The digital counterpart is WONDERFUL because you can UNDO at will.