Eating behavior
Why does my dog's appetite change with the seasons
Last updated 23 September 2026 · How we write and check this
Short answer
Seasonal appetite shifts are common and largely tie to activity level and temperature: many dogs eat more in colder months when the body burns extra energy staying warm and being generally more active, and less in hot weather when both activity and the internal heat of digestion are less welcome.
Cold weather tends to increase appetite
Maintaining body temperature in cold conditions takes extra energy, and dogs that spend more time active outdoors in cooler months, playing in snow or on brisk walks, often show a genuine, healthy increase in appetite to match that higher energy expenditure.
Hot weather tends to reduce it
The opposite pattern shows up in summer, with lower activity levels and the added internal heat load of digestion both working against a strong appetite during the hottest parts of the year.
Adjusting portions sensibly across the year
Reviewing body condition every few weeks and adjusting portions modestly for a genuinely more or less active season keeps weight stable, rather than feeding an identical amount year round regardless of how much the dog's actual activity and needs shift with the weather.
Key takeaways
- Appetite naturally rises in colder months due to the extra energy needed for warmth and activity.
- Appetite naturally falls in hot weather due to lower activity and the internal heat load of digestion.
- Adjusting portions modestly across seasons, based on regular body condition checks, helps keep weight stable.