DEAR DIDI: Is it ever possible that, through no fault of the human or the dog, the two are just mismatched? -Worried in Lathrop DEAR WORRIED: This is a question that crosses every dog owner’s mind at some point in time. If you own a puppy … it may cross your mind daily! Some dogs are more of a challenge than others but, in my experience, it almost always comes down to dedication and resources.