Thursday Morning Riddle

I’m a fence to keep animals sorted by sections;
A tool that turns ink into prose introspections;
I mate with a cob; I give timely injections;
And let babies play with surrounding protections.

Who am I?

UPDATE: Riddle solved by Asher. See comments for answer.

2 Responses to “Thursday Morning Riddle”

  1. Asher Says:

    Pen

  2. Bill Says:

    PEN is correct. Way to go, Asher!

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