One shot for accuracy of focus on non moving objects. AI Servo for moving objects.

Of the shots you posted I do not see any that the initial shot using one shot wouldn't have taken. Of course walking out of the focus area in a burst those would be lost.

The thing that does jump out at me in the pictures is the point of focus. It should be the eye of the animal. Use a single point even in AI Servo, stay on the eye. The way I judge if a shot is sharp or not is the detail in the eyes and eyelash.