Chemical energy from the food they've eaten. Ultimately that energy comes from the sun
Carbohydrates are the primary energy source for herbivores (cows, horses, etc.). Proteins are the primary energy source for carnivores (dogs, cats, etc.).
Glucose is the only energy source that the brain can use.
Carbohydrates
light energy
The greates source of energy is the Sun
Wind
protiens
solar
An energy source for dogs primarily comes from their diet, which should include a balance of proteins, fats, and carbohydrates. Proteins provide essential amino acids for muscle maintenance and repair, while fats are a concentrated energy source. Carbohydrates can also supply energy, though they should be included in moderation. Additionally, certain vitamins and minerals are crucial for overall energy metabolism and health.
Wind energy.
Carbohydrates
Carbohydrates