Chick with a 3rd leg.

Howdy all.

So as the title says, I have a chick with a 3rd leg growing out of its backside. Didn’t notice till I got her home and took them out individually to check. Lo and behold she had bad pasty butt and another malformed leg.

Idk what to do with her, if I should take her back to the store, cull her, or let her live.

She seemed social at first but now that I have her in the setup she is being a loner and breathing harder than the others. Her back has some kind of bone pushing on the skin and her vent is off to the side as a result and directly pooping onto the other leg.

Im also planning to post this on the other chicken sub.

What are you guys thoughts.?