Thanks for the suggestion. I'll give that a try :)
Hi, my cat does this sometimes a couple of times a week and goes on a couple of weeks break and also acts perfectly fine-playing, eating, etc. I'm a little worried, too. But, she seems fine! What I plan to do is to give her a hairball remedy twice a week and see how that goes. I'd try that with your kitty, too. It's cheap and worth a try with our cats especially since there's no other symptoms.
I feed her both "wellness" brand wet food and "california natural" dry food. It usually happens soon after eating, but it happens with both foods.
What food are you feeding your kitty? It would help if you gave us a bit more information.
It isn't unusual, but it can hopefully be prevented. Twice in one day is too much if it's happening frequently.