Sick Kitty?

Is he truly vomiting every time he eats? If so, that may be a sign of GI tract obstruction... when dogs and cats vomit every time they eat, a cause can be something (a toy, a string...) that they ate that wasn't food that is now preventing the movement of food from the stomach into the intestinal tract. Other things to think about is inflammatory bowel disease (requires medication to treat); kidney or liver dysfunction (resulting in toxins in system causing nausea and stomach upset = vomiting). Helpful information would be how old is he? A young/playful cat is more likely to have ingested a foreign object that he was playing with; or perhaps got into a toxic substance (e.g., ingestion of Lilies are very bad for cats). An older cat (e.g., 10+ years old) may be more likely to have a more serious underlying problem (such as kidney/liver problems or even possibly consider cancer).