I think wet food is OK as long as it is not the only thing you feed your dog (some of it can give your dog diarrhoea). We give Sparky some dry dog biscuits in the morning and he munches on them whenever he wants during the day (it's important to have plenty of water available when giving dry food) and at night for his dinner he will have some canned food. In Australia all dog food is labelled as to whether it meets basic nutritional standards. As long as the food is nutritious I can't see any harm in feeding your dog wet food.