Before I answer that question – I need to share a little pet food history. Back in the early days of commercial pet food, veterinarians noticed that when puppies were fed the same commercial food that the adult dogs were eating – they did not grow and thrive the way they should. Back then, commercial dog foods and cat foods contained very little quality meat – the protein mostly came from grains the food contained. It was determined that puppies and kittens need a higher protein food in order to develop properly. This change was important, however the bad news is that the protein was not required to come from meat sources – the majority came from inferior grain sources. The new requirements just required a higher percentage of protein for a growth food – a puppy food or a kitten food – there were no specifications as to where the protein came from (still holds true today).

Today, AAFCO has set standards for puppy foods to be a minimum of 22% protein (adult dog food minimum 18% protein), standards for kitten food must be a minimum of 30% protein (adult cat food 26% minimal protein). Besides a few other very insignificant differences – the amount of protein is the only difference between an adult dog food or an adult cat food to a puppy food or kitten food.

So, to answer the question above – you can feed a puppy food or kitten food, but you don’t have to if you are feeding the right food! Remember, except for percentage of protein, there are no significant differences in an adult pet food to kitten or puppy food.

Many pet food lines have protein percentages above the minimal requirements for puppies and kittens. Some pet food formulators have determined in their research that 18% protein for adult dogs and 26% protein for adult cats is not optimal – so they formulate their foods with higher protein levels than the required minimal. In other words – many adult foods meet the same nutritional requirements for puppies and kittens even though they are not labeled specifically as puppy food or kitten food. As an example…ABC Chicken & Rice Puppy Food has a protein percentage of 23% and ABC Chicken Kitten Food has a protein percentage of 32% – but XYZ Chicken & Rice Dog food has a protein percentage of 25% and XYZ Chicken Cat Food as a protein percentage of 35%. Both ABC brands and XYZ brands meet the required protein levels for puppy or kitten foods as well as adult dog and adult cat food. So, a puppy owner or a kitten owner could feed their new baby the XYZ pet food – even though it is not labeled specifically for puppies or kittens.

Before I go any further – I have to mention a little about canned pet foods. ANY canned or pouched pet food (a moist pet food) contains at least 70% to 85% moisture. Protein percentages in canned pet foods vary from 7% to 11% – far below the minimal requirements necessary for adult dogs and cats as we