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.
Cat species comprise about 16% of the world's carnivores. The taxonomic classification has fluctuated since new morphological and genetic research has been documented. The Felidae family has 18 genera encompassing about 40 species. There are 13 genera within the Felinae subfamily, 4 genera within the Pantherinae subfamily and 1 within the Acinonychinae subfamily.