He sometimes employed experiments to further his research, at one time repeatedly weighing a caged bird and noting its weight loss between feeding times.
Sorting of produce to separate the saleable from the unsaleable can result in high percentages being discarded, and there can be high weight loss from the trimming of leafy vegetables.
Clinical signs vary with the severity and extent of the disease and include anorexia, marked weight loss, stertorous respiration and conjunctivitis with marked chemosis.