Advanced age, various ailments, and genetics play a significant role in cellular oxidation, which in turn affects the energy levels of animals.

Diet also plays a significant role in the energy of animals. For example, 40% of cats are obese, which hinders movement and physical activity.

Here are breeds bred for tasks such as hunting, herding, or rescue work. They require a lot of exercise in wide areas, especially natural ones.

If you are interested, the most energetic cat breeds are the Abyssinian, Bengal, Siamese, Manx and Savannah.

For example, these five dog breeds consume the most energy throughout the day:

1. English Springer Spaniel: originally bred for hunting and retrieving prey.
2. Jack Russell Terrier: small but full of energy, Jack Russell Terriers are excellent for activities like hunting and canine sports.
3. Labrador Retriever: active and playful, excellent for active families.
4. Siberian Husky: originally bred to pull sleds in cold climates, Huskies are very active dogs and withstand low temperatures well.
5. Vizsla: known for their high energy and hunting abilities, they require a lot of exercise and outdoor activities.

Although fatigue is normal after intense exercise or reaching a certain age, unusual fatigue, such as exercise intolerance, frequent exhaustion, loss of appetite, or changes in behavior, may indicate underlying issues.

Among the most common causes of this type of fatigue in dogs are:

Heart problems

Heartworm or canine filariasis

Parvovirus and distemper

Nutritional problems

To manage regular fatigue in dogs, it's important to maintain a balanced diet, regular exercise, good hydration, and proper sleep hygiene.

It's essential to watch for signs of excessive lethargy in dogs and other animals. Veterinary attention should be sought to ensure their health and well-being.

Remember that regular check-ups can help make adjustments to the diet, control weight, and recommend different exercises for pets lacking vitality and energy.

A professional can determine the exact cause of fatigue and recommend appropriate treatment, which may include blood tests or other diagnostic tests to help maintain their vitality.