Often confused with the onset of mycoplasmosis, one-eye colds are usually associated with a peck in the eye or some other type of physical injury affecting the eye. One-eye colds can also be caused by improper ventilation, drafts or dampness in the loft.
A watery or mucous discharge in only one eye is usually the symptom most commonly noticed, but occasionally both eyes will have watery appearances. Sometimes one eye can become completely shut, depending upon the degree of infection.
Maintaining proper ventilation and not allowing overcrowded conditions to manifest themselves in our lofts will go a long way in preventing one-eye colds. It is also considered good loft hygiene to keep dust levels to a minimum, as many types of infectious bacteria are carried by dust particles.