There are a few factors to consider when determining if your cat is throwing up too much. The frequency of vomiting is one factor. If your cat is vomiting more than once a week, it could be a sign of an underlying health problem. It's also important to note the consistency of the vomit. If your cat is throwing up undigested food, bile, or blood, it's a sign that something more serious may be going on and you should take them to the vet. If your cat is vomiting frequently, but the vomit is mostly hairballs, it may not be a cause for concern. Cats groom themselves often and ingest a lot of their own fur, so it's normal for them to vomit hairballs. But if you notice your cat is throwing up large amounts of hairballs, it may be a sign of an underlying issue such as hairball blockage, so it's important to take them to the vet. It's also important to consider your cat's behavior when determining if they are vomiting too much. If they appear lethargic, have a decrease in appetite, or are not drinking enough water, it may be a sign of an underlying medical condition and you should take them to the vet immediately. If your cat is vomiting more than two to three times a week, or is displaying any of the above symptoms, it is important to take them to the vet as soon as possible. Your vet will be able to determine the cause of the vomiting and provide the appropriate treatment.