An active dog or cat needs energy matched to its weight, age, size and exercise level. There is no single amount that fits all: the food packaging gives a guide and the vet can adjust it.
Dogs
They are omnivores and do well on complete, balanced food. If they run or hike a lot with you, check they are not losing or gaining weight for no reason. Avoid intense exercise right after a meal.
Cats
They are strict carnivores and need nutrients found only in meat, such as taurine. A good dry or wet food made for cats covers this. A home-made diet without vet guidance usually falls short.
Water
Always fresh and within reach, especially in hot weather or after exercise. On long walks, bring water for them too.
Foods they must not get
Among the best known are chocolate, grapes and raisins, onion and garlic, alcohol, avocado and anything with xylitol (a sweetener in chewing gum and some sweets). Cooked bones can splinter and cause injuries. If your pet has eaten any of these, call your vet right away without waiting for symptoms.