Latero-lateral radiograph of a four-year-old clinically sound captive cheetah displaying the measuring points of bone thickness: A: Nasal bone; B: Parietal bone; C: Nuchal crest; D occipital bone; E: Osseous tentorium; F: Tympanic bulla; G: Presphenoid bone; H: Cribriform plate; I: Palatine bone.