If you use warm water to brew dog food for your dog, it should take about 15-20 minutes. If you use cold boiled water to brew dog food for your dog, it should take more than 20 minutes. When brewing dog food, check the dog food. When the dog food becomes larger and softer around it, you can feed it to the dog. Do not soak the dog food completely, otherwise the dog will not like to eat it. You can also use goat milk powder and milk when brewing dog food, which is more nutritious.