We have a chook we THINK is elderly - we were given her by an animal shelter after they'd raided a chicken hoarder's house (the lady had 50 chooks in one small backyard). So, we don't know her age exactly, but she seems old. At the start she laid us some eggs, but now they are either soft shelled, or totally deformed. It's the deformed ones (elongated and lumpy) that worry me. Is this normal for an elderly hen, or may she have an infection? She seems very healthy otherwise. Thanks!