I don't wish to sound judgemental hon, really I don't, but this cat needs to be seen by a vet, either to start some potentially expensive diagnostics and follow up treatment or, if you can't afford it, to be put to sleep. If he's throwing up several times a day, he will scour his throat and stomach and cause even more problems.
As Cassie, above, has said, there are so many things that could be causing this and the majority of them cannot be dealt with without veterinary input. If sensitive tummy food and pure meat are not stopping the vomiting, it's unlikely to be just a food issue.
As Cassie, above, has said, there are so many things that could be causing this and the majority of them cannot be dealt with without veterinary input. If sensitive tummy food and pure meat are not stopping the vomiting, it's unlikely to be just a food issue.