1 Chair knee extension: Sitting in a chair, rest your foot on another chair so the knee is slightly raised. 2  Gently push the raised knee toward the floor using only leg muscles. 3  Hold for 5 - 10 seconds and release. 4  Repeat 5 times on each leg.
Hematemesis in Cats. Hematemesis, or the vomiting of blood, can affect a wide range of systems, depending on the source. The gastrointestinal system may be affected due to trauma, ulcer, inflammation, or the presence of a foreign object.
Hairballs. Probably the number one cause of cat vomiting is hairballs. When your cat grooms and cleans himself, the fur goes through his intestinal tract and generally comes out in the stool. But sometimes cats have tender stomach and you'll hear the hacking cough that's a precursor to them vomiting a hairball.