He should be seen by his veterinarian. There are a number of things that could be going on: Intestinal blockage, organ failure, thyroid disease, food allergies, or it could simply be hairballs. The veterinarian will likely recommend bloodwork and/or x-rays to properly diagnose the problem. If the cat is not eating, or is vomiting any food that he does eat, he should be evaluated sooner rather than later. Here's hoping it is nothing too serious. Good luck!
My Friend's 8 year old cat is puking orange stuff a lot for the past couple months. What should we do? What is Wrong with him?
That orange stuff is chewed up catfood which he's vomiting as he's trying to bring up furballs.He needs to be checked out by the vet to have those furballs removed.