Q: The foxes are getting in at night and attacking the chickens . I shall have to guard *them* .
Are "the chickens" and "them" the same?
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A: yes

Q: Dan had to stop Bill from toying with the injured bird. *He* is very compassionate.
Are "Dan" and "He" the same?
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A: yes

Q: Our mistress hired a room for my crippled sister Nelly , and she gave her knitting and needlework when she was able to do it, and when she was ill she sent *her* dinners and many nice comfortable things and was like a mother to her.
Are "Nelly" and "her" the same?
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A:
yes