I just realized my girl only has 4 nails

I just realized my littlest chicken only has nails on 4 of her toe, combined. It's not fresh, and I know her feet haven't been injured since I've had her. So I'm going to either assume it was a birth defect or something happened at her previous owners.

My question is - will this cause issues for her later on? She doesn't seem to be in any pain. She's not bleeding. No open skin. And I must say she's the fast chicken I've got!

Just want to know if there's anything i should look out for.