My cats have been on Hills Sensitive Stomach and Skin for years because one of the cats used to get some digestive issues when we gave her something else. But the other cat frequently vomits (always has so vet isn't concerned) and when he does it is always the dry food that comes up. Because we leave a bowl out for them all the time I suspect he eats too much too quickly and is then sick, but now we have run out of their normal food and I am thinking of trying something else to see if that makes a difference. They are 11yo now and so I want to make sure they are getting what they need to stay healthy. Is there any particular dry food that is better quality than others?