This is a quote from a post on Facebook from the Icelandic chicken group:
This is my best friend’s hen.. her name is Hildigard (the hen) and she is 10 years old… anyone else here with old ladies that they would like to share a picture of?
I bolded the text where she clears up the main problem with using pronouns—ambiguity of antecedent. What, exactly, does the pronoun refer to? That’s why I recommend you avoid using pronouns.
By the way, here is a picture of Hildegard.