What is the main difference between puppy food and adult dog food?

What is the main difference between puppy food and adult dog food? And is there a big difference between puppy treats and adult dog treats?

The nutritional density is different: puppy food will contain more fat, protein, and calories, along with several other vitamins and minerals. Adult food will be lower in those nutrients so that grown dogs, with lower requirements, do not get too much of them. Most adult foods also have lower fat and protein contents, but some made for very active adult dogs will not. Senior dog foods will cut even farther back on the calories and fat, but start to increase the amounts of some key nutrients (vitamin c) while reducing the amounts of others (sodium) to lessen the burden on the aging liver and kidneys.Look on the dog food label to find out the actual quantities or proportions of nutrients in a specific brand or bag of food.

Puppy food is richer and more nutrient dense than adult dog food In particular the protein and fat content are higher in puppy food.. After all a puppy is still growing while an adult dog is just maintaining.

http://www.dognutrition.com/puppy-vs-adult-dogfood.html

It has the protein for your dog to grow and develop. If you have a giant breed dog(great dane, mastiff, etc.) then you shouldn't feed it to them.

Go to dogfoodadvisor.com and analyze the ingredients in your puppy food and the same brand adult food. There are different amounts of certain ingredients. Also, usually puppy food has smaller kibbles, (I'm talking about dry food) and is easier for their baby teeth to chew. Same with treats, for example, small rawhide vs very large ones. Small tiny Milkbones versus big, heavy stronger ones.