Chickens like humans can get ill. Most of the time this won't be anything more serious than a runny nose or a spot of diarrhoea (caused by eating too many slugs). Omlet chickens are fully vaccinated and it is unlikely you will have any serious infections as these usually only occur where large numbers are kept together. But for peace of mind we have provided a comprehensive list of illnesses. As a general rule, keep the eglu clean, ensure a fresh supply of water and a proper balanced diet and you should have no problems.