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Writer's pictureWest Coast Dog Mom

How To Know If You're Overfeeding or Underfeeding Your Dog Using RER

Updated: Apr 19, 2023

As a dog parent, one of the most important things you can do for your furry friend is to make sure they are eating the right amount of food. Overfeeding or underfeeding your dog can have serious consequences on their health and well-being. In this blog post, we will explore how to determine if you're feeding your dog the right amount of food using RER (resting energy requirement).


Determining your dog's RER is a simple calculation that can help you determine how many calories your dog needs on a daily basis. It takes into account your dog's weight, age, and activity level to give you an accurate estimate of their daily energy needs. Once you know your dog's RER, you can adjust their food intake accordingly to ensure they are getting the right amount of food.


Let's get started!


Understanding Resting Energy Requirement


Resting energy requirement (RER) is the amount of energy your dog needs to maintain their basic bodily functions while at rest. This includes things like breathing, circulating blood, and maintaining body temperature. RER is calculated based on your dog's weight, age, and activity level. It's important to note that RER is just an estimate, and your dog's actual energy needs may be higher or lower depending on their individual metabolism.


The formula for calculating RER is as follows:


RER = 70 x (body weight in kg) ^ 0.75


This formula is valid for adult dogs weighing between 2 and 45 kg.


Weighing Your Dog


Before you can calculate your dog's RER, you'll need to know their current weight. If you don't have a scale at home, you can take your dog to the vet or a pet store to be weighed. Make sure to weigh your dog on the same scale every time to ensure accuracy.


Once you have your dog's weight in kilograms, you can plug it into the RER formula to calculate their daily energy needs.


Calculating Your Dog's RER


Now that you have your dog's weight, you can calculate their RER using the formula we provided earlier:


RER = 70 x (body weight in kg) ^ 0.75


For example, if your dog weighs 20 kg, their RER would be:


RER = 70 x (20 kg) ^ 0.75 = 674 calories per day


This means that your dog needs approximately 674 calories per day to maintain their basic bodily functions while at rest.



Adjusting Your Dog's Food Intake


Now that you know your dog's RER, you can adjust their food intake accordingly. Most dog food labels will list the number of calories per cup or per serving. You can use this information to calculate how much food your dog needs to meet their daily energy needs.


For example, if your dog's food contains 400 calories per cup, you would need to feed them approximately 1.7 cups of food per day to meet their RER:


674 calories per day / 400 calories per cup = 1.7 cups per day


It's important to note that this is just a starting point. Your dog's actual energy needs may be higher or lower depending on their activity level, age, and individual metabolism. You may need to adjust their food intake up or down to ensure they are maintaining a healthy weight.


Signs of Overfeeding


Overfeeding your dog can lead to obesity, which can have serious health consequences. Some signs that you may be overfeeding your dog include:

  • Your dog is gaining weight rapidly

  • Your dog is always begging for food or acting hungry

  • Your dog has trouble exercising or seems lethargic

If you notice any of these signs, you may need to adjust your dog's food intake down to help them maintain a healthy weight.


Signs of Underfeeding


Underfeeding your dog can also have negative consequences on their health and well-being. Some signs that you may be underfeeding your dog include:

  • Your dog is losing weight rapidly

  • Your dog seems lethargic or weak

  • Your dog is always begging for food or scavenging for scraps

If you notice any of these signs, you may need to adjust your dog's food intake up to ensure they are getting enough food to meet their energy needs.


Factors That Affect Your Dog's Energy Needs


As we mentioned earlier, RER is just an estimate of your dog's daily energy needs. There are several factors that can affect your dog's energy needs, including:

  • Age: Puppies and senior dogs may have different energy needs than adult dogs

  • Activity level: Dogs who are more active will need more calories than dogs who are less active

  • Breed: Some breeds have higher or lower metabolisms than others

  • Health: Dogs with certain health conditions may have higher or lower energy needs than healthy dogs

Keep these factors in mind when adjusting your dog's food intake to ensure they are getting the right amount of food.


Final Thoughts


Determining if you're overfeeding or underfeeding your dog can be a challenging task, but using RER can make it easier. By calculating your dog's RER and adjusting their food intake accordingly, you can ensure they are getting the right amount of food to maintain a healthy weight and lifestyle. Remember to keep an eye out for signs of overfeeding or underfeeding, and adjust your dog's food intake as needed. With a little bit of effort, you can ensure your furry friend is happy, healthy, and well-fed!


Additional Tips and Resources

  • Consult with your veterinarian to determine your dog's specific energy needs

  • Use a measuring cup to ensure you are feeding your dog the correct amount of food

  • Consider using a slow feeder bowl to prevent your dog from eating too quickly

  • Incorporate exercise into your dog's daily routine to help them maintain a healthy weight


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