Sick cats, is it the food?

I am not sure what to do. I opened a new bag of Orijen the other evening. The next day I found vomit on the floor and that morning two of the cats threw up. They seemed ok except for that so I gave them some other food.
I thought it must be a coincidence so I poured some more of the Orijen in a bowl tonight, and the cats sniffed it and then walked away (even Spot the chubby one who is usually the first to gobble up any food.) I got rid of the bowl of food I poured when I saw that but I don't know if it really was the food or what.
I'm not sure what to do now, should I throw out the bag or try to return it? Do you think it's the food or just a coincidence?

I would call the company and not use that bag of food. There is an expiration date that may have other numbers with it on the bag. They can tell the "batch" or lot that the food came from.

I hope everyone feels better today.

Take it to the store and replace it for another bag - make sure the bag is from a different batch. You can email Orijen about it too. By curiosity: is this a 15lb bag?

No it's the smaller size bag, I think 6 pounds?

I'll see if I can returned it to the store.

I've come across bad bags once in a while. Definitely don't feed them any more from that bag, or any of the same lot.

Poor babies!

Hope it all goes well for you, and no one else is sick!