How come she said "its" not "his" here? Because I could see that this alligator is "he" on the next sentence.
With animals it is perfectly acceptable to use "it" as a pronoun even if you know the gender. It is generally down to personal choice and is not a grammar based issue. Ex: Look at the cat! Its eyes glow in the dark. Ex: Look at the cat! Her eyes glow in the dark.
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