A doctor or healthy eating blog may have convinced you to count the calories in human food, but have you ever looked at the calories in dog food? What about the calories in cat food? Understanding what and how much your pet eats is important to making sure they're getting the nutrients they need to stay healthy.

How Many Calories Does a Dog or Cat Need?
Calories needs vary by pet (for both cat and dog), so make sure to speak with your veterinarian to determine the proper caloric intake for your pet.
There is more than simple math goes into figuring out how many calories your pet should consume. For example, if your dog is extremely active and goes on runs with you every day, he will need more calories in his meal to make up for the energy he exerts while exercising. Larger breeds also need more calories to sustain their daily efforts.
Smaller pets and pets that are currently overweight may need to consume fewer calories than the standard range. Other changes such as pregnancy, aging or an illness will affect how many calories your dog or cat needs.
However, it's important to not make assumptions about the calories your pet should eat in a day. To know what range is right for your pet, speak with your veterinarian. They'll be able to take your pet's size, body and lifestyle into consideration before recommending how many calories your dog or cat should be consuming on a daily basis.
Counting the Calories in Your Pet's Food
If you're concerned about the amount of calories in dog food or the calories in cat food, but don't know how to figure out how much to feed your pet, start simple. First, the calories should be listed on the side of the can or bag just like they are for most human foods. Expect to see them listed as "kCals" or kilocalories, which is a more scientifically accurate term for calories.
The Association of American Feed Control Officials (AAFCO) suggests that kCals should be listed on pet food labels "as kilocalories per kilogram of food as fed and as kilocalories per familiar unit." This is because the different types of food — such as dry food versus canned wet food — will have different values. The AAFCO cautions against making one-to-one calorie comparisons between different types of food because the moisture content of canned food results in fewer calories per kilogram "as fed" than dry kibble.
All pet foods sold in the US will have an AAFCO statement that identifies the product as being nutritionally adequate for a dog or cat and its intended category purpose (i.e., growth, reproduction, maintenance, etc.) Always consider the statement about what life stage the food is best for. Your pet doesn't need a puppy food product, for example, if he is a senior dog. Life-stage-specific foods are formulated for the nutritional needs of a cat or dog of that age.
It's important to work with your vet when altering your pet's food, or deciding on a new food plan for a fur friend you've just brought into your home. Depending on whether you're feeding your pet wet or dry food, or a mixture of both, your vet should be able to tell you just how much of each should be consumed at each feeding.
