Tests to diagnose Crohn's disease include: 1  Barium enema or upper GI series. 2  Colonoscopy or sigmoidoscopy. 3  Computed tomography (CT scan) of the abdomen.  Endoscopy, including capsule 1  endoscopy. Magnetic resonance imaging (MRI) of the abdomen.  Enteroscopy.
Most species in this family sever the spinal chord of their prey with their canines. Species in this family have rounded heads and short muzzles. They have excellent eyesight and hearing and a good sense of smell. The big cats in this family, like the lion, tiger, jaguar and leopard, can roar, but they can not purr.
Of the 13 terrestrial families in the order Carnivora, they are the strictest carnivores. The first cats emerged during the Oligocene, about 25 million years ago. In prehistoric times, there was a third subfamily, the Machairodontinae, which included the saber-toothed cats, such as the Smilodon.