Best Medium-Sized Dog Breeds Medium-sized dog breeds are those which weigh between 20 and 60 pounds, a maximum height of 18–25 inches and an average lifespan of 10–13 years. Medium breeds are easier to handle, maintain and are usually calmer than other breeds.
Let us now take a look at some of the popular medium breeds, small-medium breeds and the calmest breeds. Also See: Most Popular Medium Sized Dog Breeds in the World Best Medium-Sized Dogs 1. Labrador Retriever Widely regarded as the best dog breed, the Labrador Retriever is one fine dog! They are loyal, friendly and energetic dogs and really easy to maintain. 2. Golden Retriever Golden Retrievers are happy-go-lucky beings and spread joy everywhere they go. They love pleasing people and are very friendly, smart and very loyal.