I've been palpating the flock one by one to make sure their crops are full and muscle tone/fat level is good (it's a bitterly cold winter and they need to be in good health). Is it normal to feel the "keel bone" as being sharp against my hand? Should it be covered in a bit of fat or muscle? The sides of the bone don't feel padded, either... I'm afraid my flock is a bit thin! ps: they were wormed 2 weeks ago with Piperazine, egg production is good and steady.