Over the last year my cat was being sick at least once a week. Tried all types of dried food. Absolutely would not touch the Hydrolysed soya dried foods recommended by vet. Finally we went from weekly to 4 weeks of being sick when switching to Hydrolysed poultry. But I felt she may have a problem with grain too. This product is the only food that is both hydrolysed and grain free. I am delighted to say after a year of so many food trials, we are now 3 months and no vomit.