35 breeds all with size, barking, coat and sociability taken from the official AKC breed profile, with source and date on every row American Kennel Club, akc.org/dog-breeds, 04/09/2026
26 distance runners breeds classified in this comparison as fit for long distance running, based on size and absence of brachycephaly Editorial classification of this comparison, based on AKC data
3 of 6 are brachycephalic of the breeds the AKC itself recommends for apartments, half should not run because of the narrow airway AKC (apartment) crossed with the editorial brachycephaly classification
Which breeds have a double coat, according to the AKC?
The AKC does not publish heat tolerance per breed, so this comparison has no such column and does not claim which breed "handles heat better". What can be answered, from the coat field published by the AKC, is which breeds declare a double coat (undercoat): Border Collie, Australian Shepherd, Labrador Retriever, Brittany, English Springer Spaniel, Siberian Husky, German Shepherd, Alaskan Malamute, Australian Cattle Dog, English Setter, Curly Coated Retriever, Golden Retriever, Shiba Inu. That is 13 of the 35 breeds in this comparison. A double coat is a label fact from the AKC, not a thermal comfort forecast: each owner should adjust training to the actual weather of the day, and the data here is only what the official source publishes.
Why should a puppy not train for running?
Because the skeleton's growth plates are still open, and repetitive high-impact effort can injure them before the bone finishes forming. According to VCA Animal Hospitals (a network of veterinary hospitals), in puppies the muscles, ligaments and tendons are already stronger than the growth plate, so an injury that in an adult dog would be a simple sprain can, in a puppy, damage the growth plate, and that type of damage does not always heal in time for the dog to grow straight and strong. The same source recommends waiting for growth plate closure before starting a high-impact exercise program, and cites long distance running and repetitive jumping as the highest-risk activities at this stage. Closure time varies by size, faster in small breeds and slower in large ones, so the dry age of "can start at X months" shifts with the dog's size, and it is not a number the AKC publishes per breed in this comparison.
Does the AKC group replace the energy level?
Not exactly, and it is important to be honest about it: the AKC does not publish an energy level per breed, so this comparison has no such column and does not invent that number. The AKC group (sporting, herding, working, hound, non-sporting, toy, terrier) works as an approximate proxy, because most breeds in the working and sporting groups tend to have more appetite for sustained exercise than toy group breeds, but that is our editorial approximation, not a direct datum from the source. Of the 26 breeds this comparison classifies as distance runners, most are in the sporting, herding or working groups; the 3 sprinters (Greyhound, Whippet, Saluki) and the 6 counterpoints (Pug, English Bulldog, French Bulldog, Cavalier King Charles Spaniel, Shiba Inu, Basset Hound) complete the 35 breeds of the survey.
What do "distance runner", "sprinter" and "counterpoint" mean here?
They are three editorial categories of this comparison, not fields published by the AKC. Distance runner is the breed this survey considers fit, by the combination of size, anatomy and absence of brachycephaly, for long distance running: 26 of the 35 breeds. Sprinter is the sprint sighthound, built for short bursts, not for the long haul: Greyhound, Whippet, Saluki. Counterpoint gathers the breeds this comparison does not recommend for running, usually because of brachycephaly or anatomy and temperament incompatible with prolonged aerobic effort: Pug, English Bulldog, French Bulldog, Cavalier King Charles Spaniel, Shiba Inu, Basset Hound. The decision yardstick is always the same: data published by the AKC (group, size, barking, coat, sociability) plus the brachycephaly flag, never a mileage number per breed, because no official source publishes that.
Educational content. It does not replace a consultation with a dietitian or a physician. An individualized meal plan is an act reserved to licensed dietitians under Brazilian law (Lei 8.234/91). Sources are cited with a link for verification. Images under the Unsplash License (free use, including commercial).
