Senior Dog Age: When is a Dog Considered a Senior?

What Age is a Dog Considered a Senior?

Determining when a dog is considered a senior depends on its breed and size. Large dog breeds tend to have shorter life spans compared to smaller breeds. It is important to note that this is a generalization and there can be exceptions within each breed. A dog is considered a senior when it has reached the last 25 percent of its life span. The American Kennel Club has given us the following generalizations to help us know when a dog is considered a senior dog: 

• Small Dogs less than 20 pounds: 8-10 years 
• Medium-sized dogs 20-50 pounds: 8-10 years 
• Large breeds 50-90 pounds: 8-9 years 
• Giant breeds more than 90 pounds: 6-7 years 

As a side note, indoor dogs generally have longer life spans than outdoor dogs. Outdoor dogs are exposed to various elements and territorial stressors that can affect their health and lifespan. 

Signs of Aging Dog

As your senior dog ages, you will notice outward signs (similar to us) such as graying hair, less energy, and taking longer to get up. Some of your senior dog’s aging symptoms can be linked to health problems such as: 

• Diabetes
• Heart disease 
• Joint and bone disease 
• Kidney or urinary tract disease 
• Liver disease 
• Overweight issues 
• Sudden weight changes 
• Vision or hearing loss 

As a senior dog ages, they can also suffer from cognitive issues. Canine cognitive dysfunction will present symptoms such as confusion, agitation, restlessness, and vocalizing during the evening. 

Dog Age in Human Age

In addressing the question of what age is a senior dog, the old rule of 7 dog years to 1 human year is flawed. During the initial two years of a dog's life, their development occurs rapidly and then levels out. In actuality, this period can be better approximated at around 10.5 human years for the first two dog years. However, it is important to note that this calculation alone does not take into account variables such as size, breed, and living conditions.



A dog's seniority cannot be accurately determined by a single mathematical formula. The sheer number of factors to be considered, including various breeds, sizes, and lifestyles, makes it impossible to establish a universal standard for senior dog age.

How to Keep Your Senior Dog Happy and Healthy

As your beloved canine companion enters their golden years, it's important to provide them with the care and attention they need to stay happy and healthy. But at what age is a dog considered a senior? Typically, dogs are considered seniors when they reach around seven to nine years of age, depending on their breed and size. To keep your senior dog happy and healthy, it is crucial to prioritize their overall well-being: 

• Regular veterinary check-ups are essential to monitor any age-related health concerns and address them promptly. 
  
• A balanced and nutritious diet tailored to their specific needs is essential for maintaining a healthy weight and supporting their aging bodies. 
  
• Regular exercise is equally important but should be adapted to their energy levels, with low-impact activities and shorter walks incorporated into their routine. 
  
• Providing a comfortable and cozy sleeping area, as well as joint supplements if needed, can help alleviate any discomfort or stiffness. 
  

Additionally, mental stimulation, such as puzzle toys or interactive games, can help keep your senior dog's mind sharp. Lastly, don't forget to give them plenty of love, attention, and quality time together to ensure their happiness and emotional well-being.

About Chipman Road Animal Clinic 

At Chipman Road Animal Clinic, we have a team of highly experienced and dedicated veterinarians, including Dr. Rooney, Dr. Holt, Dr. Cook, and Dr. Hawley, who collectively have over 80 years of experience. Our clinic is committed to providing preventative and illness care for dogs and cats of all ages. We understand the importance of keeping your senior dog happy and healthy. 

Our veterinarians and staff have been providing pet lovers in Lee’s Summit and the surrounding areas with years of ongoing education, support, and training to help them keep their furry companions in the best possible condition. We strive to ensure that your senior dog receives the care and attention it deserves during its golden years.

You can count on our friendly and caring staff to assist you whenever you need us. Whether you have questions or concerns about your senior dog's health or simply need advice on how to keep them happy, we are here to help. To learn more, please give us a call or, even better; drop by our clinic any time. We are dedicated to providing professional help and support to ensure the well-being of your senior dog.