A mature dog is essentially any dog that is older than 1 year of age.
The exception to this rule are large breed dogs that don't stop growing until they are 2 years of age.
Mature dogs only need 1 meal per day, but you can, feed two meals per day. But if you feed your dogs properly and if they eat all that they want at each meal, you will find that although they may look for or ask for some food during the day (which is normal), that they will really only need 1 meal per day.
The reason why a dog may still look for or ask for some food during the day, even though they are not really that hungry, is because as a carnivore they naturally and instinctively worry that maybe their next meal will not be found. Of course, your dog does not have to worry because you are going to feed your dog again. But, in the mind of your dog, they worry about their next meal — it's just in their nature to be like this.
Feeding 1 meal per day allows and encourages your dog to eat a large meal. Then after eating their large meal, your dog may play for a little before sleeping. Then, during their period of rest, their body does all of its detoxification work.
Dogs are not herbivores which are constant grazers. Dogs need big meals, not small meals. Feeding your mature dogs more than once per day is not really beneficial and in fact can be detrimental — leading to such problems as colitis.
Remember, only large breed dogs should eat two meals per day from the age of 1 to 2. But once your large breed dog reaches 2 years of age, they too only need 1 meal per day.
Ultimately, when you feed your mature dog one meal per day, you will find that when their next meal is ready to be served, they will be hungry and ready to eat.
Feeding 1 meal per day to your mature dogs makes life more convenient for us because we can leave, during the day or overnight, if necessary and not have to worry about our dogs. Feeding one meal per day gives you some additional freedom and creates less work for you.
Some people don't feel comfortable feeding just one meal per day because they are thinking of their dog as if they were human — but your dog is not human, they are a carnivore. Never loose sight of this.
If you forget how much to feed your dogs, please remember to read the page about how much to feed
which can be found in Part 1.