Disclosed is an apparatus for identifying biological states in an animal. The apparatus comprises means for identifying the animal (6) to obtain animal identification information, at least one infrared thermography camera (8) for photographing the animal to obtain infrared thermography information and fidget information about the animal and a processor (9) for receiving and processing the animal identification information. The infrared thermography information and the fidget information can be used to determine a biological state of the animal. The biological state is a predictor of onset of disease, growth states and reproductive states in the animal.