hello i took in a kitten about 5 months old off the streets a real sweet heart and i have two full grown cats already. They get along together very well. The kitten vomited up a worm about 4.5 inches long white and thin and squirmy. Im concerned seriously for all of the cats health what should i do are they going to become real sick and die? I love them very much and the kitten too but dont want to lose them all. what should i do??