The reasons why there are blood streaks in kitten’s vomit: 1. It may be caused by gastric bleeding. When the stomach wall is damaged or inflamed, it will cause the cat to vomit with blood. 2. It may be caused by oral bleeding during vomiting. 3. If the cat eats sharp food such as chicken bones, duck bones, fish bones, etc., it may scratch the intestines, resulting in a small amount of blood in the cat's vomit.