According to Kornreich, undigested hair – commonly referred to as hairballs – could be the cause of some cats' vomiting. It is not out of the ordinary for your cat to expel a hairball once ...

In general, cats will vomit if they have an obstruction to their gastrointestinal tract. "Obstructions can be caused by things other than hairballs," says Kornreich. This could include small toys ...

If you have a long-haired cat or a pet that sheds a lot, this should be a concern, as sometimes the pet is not able to vomit up the hairball and ends up just vomiting white foam.

A cat may throw up for many reasons, ranging from benign to fatal. According to Kornreich, undigested hair – commonly referred to as hairballs – could be the cause of some cats' vomiting.