Our hen Nigella (age unknown, she showed up before Christmas and adopted us) puts out an egg a day, without fail. This suggests she's not too elderly. However, the has THICK ankles, and in fact one of them is considerably thicker then the other. Much thicker than her coop-mate "Camilla" (the Leghorn). She seems perfectly normal and happy, so I don't think she has an obvious disease. Something to worry about?