The authors of this study used infrared thermography to evaluate differences in limb temperature measurements in cats presented with acute pelvic limb paralysis and hypothesized that cats affected by feline aortic thromboembolism (FATE) would have diminished affected limb temperatures as compared with those affected by nonischemic conditions. Cats were separated into 2 groups based on diagnosis. Ten cats were confirmed to have FATE. The remaining 6 cats were confirmed to have either pelvic fracture, vertebral fracture, or infectious meningomyelitis and served as the control group. Results indicate that a difference of at least 36.3°F (2.4°C) between ipsilateral nonaffected and affected limbs has an excellent specificity and high sensitivity for diagnosing FATE.