Do cats occasionally just get an upset tummy like people can? I ask because Marlee is a little over a year old now, and I've never had her throw up with the exception of after she was wormed as a kitten. In the past few weeks, she has throw up twice. The first time was after she had eaten, and was just a tiny bit of barely digested food, and she seemed perfectly normal after. Yesterday evening she had been playing with Milo, then I heard her throw up in the kitchen. I went to check and it was just less than a teaspoon of clear frothy spit. Once again, no other signs or symptoms, right back to normal. Is this okay, or something I should be worried about? She seems to be eating and drinking normally, and playing all the time!