Sentence 1: Mary was an animal care specialist at a dog and cat rescue shelter. 
 Sentence 3: However, a scared mother dog almost proved too much for Mary 
 Sentence 4:  She snapped and bit at Mary's hands when she cared for the pups 
 Sentence 5:  With time and gentleness, Mary won her over but had to stay cautious 
 Given Sentence 2: She could usually work with even the most frightened animals.