There can be many reasons for vomiting: drink too much water after eating, eat too quickly and swallow air, hairballs or eating plants/grass---especially at this time of year (printemps) when the hair is dropped because of the longer days of light. Most grain-free canned cat foods are better for the cat than dry foods (especially if they include grains such as corn, wheat, barley, rice, soy).
Here's an excellent article in English on cat nutrition and other subjects
Feeding Your Cat: Know the Basics of Feline Nutrition :: healthy cat diet, making cat food, litter box, cat food, cat nutrition, cat urinary tract health
or in French:
http://www.catinfo.org/docs/French translations/Feeding Your Cat - French PDF.pdf
Here's an excellent article in English on cat nutrition and other subjects
Feeding Your Cat: Know the Basics of Feline Nutrition :: healthy cat diet, making cat food, litter box, cat food, cat nutrition, cat urinary tract health
or in French:
http://www.catinfo.org/docs/French translations/Feeding Your Cat - French PDF.pdf