I have one hen who has laid a lash egg I'm thinking she has salpingitis but I haven't had it confirmed, she is lethargic, has very watery faeces and has lost a considerable amount of weight. She is spending time in the garden, eating and drinking but is very slow. I am monitoring her closely but Help! what to do about the other two? They have no visible problems and seem happy, they stopped laying some time ago but are over 2 years old now, will they get Ill too? Is it contagious?