Waiting with bated breath
Lily was just watching the puppy with bated breath as it zeroed in on the source of the scent. Then something happened. Lily knew the puppy had found what it had been seeking for when it eventually sat down close to one of the railroad tracks.
Climbing on the train tracks
They gingerly climbed the train tracks and approached the puppy slowly. Despite the fact that she believed they had spent the day bonding, the animal began to snarl at her with each step she took in its way. It was evidently prepared to defend something…