Why does my cat vomit on a daily basis?

Are there internet sites that talk about cat medical problems like there are for people? You might look there.

Hairballs? have you given him hairball medicine?

If he is not able to free feed and has gone for hours without his cat food dust. Are you feeding him POWDERED dry food, not good, he should be getting only canned food and easily eaten soft, pureed meats like baby food. he may be vomiting bile which is yellow because he is feeling nauseous from lack of food.
10 years old is considered “senior” for a cat and senior cats are prone to renal dysfunction, diabetes, and thyroid issues, all of which could cause vomiting, especially the thyroid.

Is his coat looking dry and dull? Is he losing weight? The extra water intake is normal for aging cats as their kidneys slow down but, it is also a symptom of diabetes, kidney and thyroid disease.
I would have him checked again and discuss his diet with your vet. You should absolutely NOT be feeding him “powdered” ground up dry food, not good at all!

@Coloma The vet told me to stop feeding him wet food quite some time ago since they assumed that was what had made him get fairly chubby in the first place. So I was just going by their advice on that one. His coat is extremely healthy, not dull or dry at all and from looking at him you wouldn’t see any outward obvious physical signs that anything is wrong, so…what am I supposed to do with that?

Also, I don’t limit his food, he always has some in his dish. Trust me he doesn’t let me let it get low. So he can eat at his leisure and is often eating. He does not seem to have an aversion to the food? But, yes, the vomit is yellow….

@deni I don’t know, it just seems odd that the vet would recommend feeding a toothless cat crushed dry food. I don’t agree.
If everything else checks out it seems that he is having some sort of intermittent gastritis issues. Worms can cause vomiting too, maybe he needs a second worming.

I know tapeworm treatments are usually 2 shots 2 weeks or so apart. Maybe take a stool sample back in and see if they are still in his system. In the meantime though I would at least try to feed him more soft, healthy foods, primarily poultry base, high quality canned or baby foods which are very bland but also pure meat with only a little water.

Best wishes!

@Coloma When we got him from the Humane Society, they had been feeding him wet food mixed with uncrushed dry food. So thats what we did for a few weeks until we noticed that he was vomiting all the time. We took him to the vet and thats when he said blend his food entirely, and also he’s too fat so cut out the wet food. Now, I’d be willing to try to change his food, but anytime I try to integrate a new food into his old food, however slowly, it always makes him sick. I guess it’s hard to tell at this point what is making him sick though really because there is constant vomit. Like, I just walked in the door 5 minutes ago, huge puddle in the middle of the rug. :( Maybe I should try wet food again, he seemed to like it AND he had lost 3 pounds last time I was at the vet. The vet did reccommend I get him some high grade food with duck protein and without grain so I did that and that is primarily what he’s eating now. Any other tips based off any of that fact? Maybe I’ll ask the people at the pet store?