My cat Tiger has been vomiting for the last 4 days now.Dont have money to take him to the vet until wed. What could of cause this? can tape worms cause this? Because he had some white worms crawling out his stool? but that was like 3 weeks ago, now i dont see any. Also when i was feeding Cabezona kitten food for when she was nursing she always leave half and tiger will eat the rest of it.Now i switched them back to dry food, could this be the cause?