He has been throwing up for a while. I thought it might be hairballs but now believe it must be something else. I've been giving him 1/4 of a antacid as the vet suggested a long ti... moreHe has been throwing up for a while. I thought it might be hairballs but now believe it must be something else. I've been giving him 1/4 of a antacid as the vet suggested a long time ago. If I don't give it to him every day he cries to go out to eat grass. He must have a stomach problem. How can I get him low cost help?