Why is my senior dog sleeping so much?

The AKC puts it simply: older dogs need more sleep because they tire out more easily. A senior that dozes more than it did at five, still eats well, greets you at the door and gets up keenly for its walk is usually just aging. The change tends to be gradual, spread over months, and the dog is still itself when awake. AAHA's senior guidelines, though, warn vets against letting owners write changes off as old age, because many have specific, treatable causes.

What makes extra sleep worth a call is the pattern around it. A change over a week or two rather than a year, a dog that is hard to rouse, sleep that has moved from night into day, or new sleepiness that comes with weight gain, a cough or stiffness are all reasons to look further. VCA's senior care advice lists sleeping more than usual among the warning signs and recommends a vet exam at least twice a year for older dogs.

The AKC lists hypothyroidism, diabetes, depression and hearing loss among the causes of excessive sleep, and VCA names hypothyroidism and heart disease as causes of reduced stamina in aging dogs. Hypothyroidism usually appears in middle age, at about 6 to 7 years on average according to VCA, with lethargy, weight gain without a bigger appetite, a dislike of cold and a dry, thinning coat. A blood test screens for it, and VCA notes that it can be managed for life, though not cured.

Heart disease deserves a closer look because it can be quiet. VCA says dogs with heart failure tire more easily and lose stamina, may cough at rest or while asleep, and may breathe faster at rest; it suggests counting breaths while your dog sleeps on several occasions so you know its normal and can report a rise. Cognitive dysfunction, the dog form of dementia, often flips the sleep pattern into daytime napping and nighttime pacing, which Cornell and AAHA both list among its signs.

Sleep is not the enemy, but neither is gentle activity. VCA notes that less exercise means weaker muscles, which makes jumping and climbing harder, so short, regular outings help even a dog that would rather nap. Give your senior a warm, comfortable bed it can reach easily, as VCA suggests, away from drafts in a Cape Ann winter; the AVMA notes that older pets are more sensitive to cold. A dog that seeks warmth all the time is worth mentioning to the vet, given the thyroid link.

Dogtown can add structure without exhausting an older dog. A half day of senior daycare is $33, with drop-off between 6:30 and 9:30 AM and pick-up between 12 and 1 PM, so the big nap happens at home, and our senior dog daycare page explains the calm groups. If the report card shows your dog asleep for most of a morning, share that with your vet. For dogs better at home, a 20-minute solo walk is $25, and overnight guests can add the Dogtown Deluxe bundle's memory-foam bed for $15 a night.