Communicable cat vomiting?

I have three cats. All 3 have been fine as of late, and about three days ago one of my cats started vomitting. This continued for 24 hours until we took away his food. After 24 hours we reintroduced the food and he has been fine... However, now one of our other cats is non stop vomitting! Is there a communicable stomach flu, or something similar in felines?!

Yes, or it could be a bad batch of food, a plant they're chewing on, etc.. A vet visit is definitely in order.

What foods have you been feeding?  Any recent changes to their diets?

They've been eating the same bag of Natural Instinct limited ingredient rabbit dry food (the only cat who hasn't been puking has an allergy, and this is the only food that works for her aside from Science Diet Z/D, which I refuse to feed them) for weeks now... And from the same case of wet food. Also- if it were food related I'm assuming it wouldn't be 1 cat at a time???

If it's the same food, then I'm inclined to suspect a plant. Any new Springtime plants you've bought recently? My cats have been puking up a lot of grass lately. We take them out for walks and they love chomping on the fresh grass, been doing it for years.