Ah, we all know that adorable dog who is always hungry – and when we say always, we mean always. If you're looking for a never-ending supply of food to keep your pet satiated, freeze-dried dog food is your answer. These foods are essentially protein-rich meats pressurised at -60 degrees celsius, which means they have very little moisture content and can be easily stored in bulk. And they're delicious, which makes them the perfect snack for your dog.