I have read a book and now some info at online sites that say dry food is very bad for cats. There is not enough water in them and they are made up of carbs which cats do not need because they are carnivores. The book, written by a vet went so far as to say cats should be fed raw meat. Both sources blamed dry food for many diseases that eventually kill cats when they are older. Also dry foods are coated with a substance that actually makes the cat become addicted to it.