Nilu - like all dogs makes for a difficult model as dogs never keep still and it's really easy for their long noses to distract your camera's AF points and put the eyes out of focus. One or two shots focused on a dog's nostrils is ok but not when you want to nail it right on the eyes and capture their emotions.
I have my camera set to switch to one point AF on the central focus point and go for servo focus to get the focus where I want it and adjust to small movements. It might help to say "sausages" too but results are inconclusive.
