When I moved from my apartment of 8 years, where they had both lived since kittens, into a house in the country, Mittens began licking her front legs and throwing up hairballs and then would throw up
white foam and couldn't stop throwing up
this white foam. I had made many trips to the vet, many tests (xrays, blood work, etc.) and nothing wrong with her. She would have to get Reglin shots (pharmaceutical that blocks something in the brain that tells them they really don't have to get sick).