The Sunspire why do piranha plant have bone in it?

he got distracted from his climb. his head lifted into the air as he caught the scent of something. there was another. some one like him, finally. younger, maybe? definitely smaller. definitely a girl.
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OHMYGODITSAGIRL- he whipped his head around to see her, his own fur raised slightly. why was she scared of him? he was scared of her! he was terrified, really. shit, shit, play it cool — he wasn't ready for this at all. hey, hey woah, he said, both to her and himself. i ain't, i'm not gonnaa...uh...hurt you or nothin?