A sport, working, or simply very active dog doesn't have the same nutritional needs as a sedentary companion dog. Poorly adjusted, diet can limit performance, slow recovery, or even weaken health in the long run. Here are the fundamentals for properly feeding a highly active dog.

Why needs change with activity

The energy expended by a sport or working dog can be 2 to 4 times higher than that of a calm-lifestyle dog, depending on the intensity and frequency of exertion. This increased expenditure implies higher needs in:

  • Energy (mainly fats, the most efficient energy source for endurance effort)
  • Protein (muscle repair and development)
  • Certain minerals and vitamins, particularly those involved in muscle function and recovery

The key macronutrients

Fats

Contrary to popular belief, fats aren't "to be avoided" in the active dog — on the contrary, they are its main energy source for prolonged exertion. A working or endurance dog generally needs a ration significantly richer in fat than a sedentary dog.

Protein

Essential for muscle recovery after exertion. A diet low in quality protein can lead to muscle wasting and slower recovery, particularly problematic for a dog stringing together many work or competition sessions.

Carbohydrates

Less central than for the human athlete, they nonetheless provide rapidly mobilizable energy, useful especially for short, intense efforts (sprints, explosive sports).

Meal timing around exertion

  • Before exertion: avoid a heavy meal in the 2-3 hours preceding intense exercise — risk of gastric torsion in predisposed breeds, and digestion mobilizing energy at the expense of exertion
  • After exertion: this is the most important window for recovery — a suitable meal in the hours following exertion promotes rebuilding energy reserves and muscle recovery
  • Hydration: to monitor before, during (if the effort is long), and after — a dehydrated dog shows markedly degraded performance and thermoregulation (directly linked to the heatstroke risks discussed this week)

Adapting by discipline

A canicross or mantrailing dog (endurance efforts) doesn't have exactly the same nutritional profile as a mondioring or agility dog (explosive, short efforts). Likewise, a transport/working dog with a sustained daily rhythm needs a stable, consistently calibrated ration rather than a one-off adjustment.

Signals to watch for

  • Unexplained weight loss despite an apparently sufficient ration
  • Slow recovery after exertion (prolonged fatigue, lack of drive)
  • Dull coat, visible muscle loss
  • Recurring digestive issues around exertion sessions

These signals warrant a ration adjustment, ideally with the advice of a vet or a sport canine nutrition specialist — needs vary considerably from one individual to another, beyond general recommendations.