Why Senior Pets Sleep More: When It’s Normal and When to Worry
- Dr. Emma Clark
- Nov 17, 2025
- 4 min read
It’s common for older pets to sleep more than they did in their younger years. You might notice your senior dog snoozing through most of the day or your cat choosing the same sunny windowsill for hours on end. But how much sleep is too much—and when could it be a sign of something more serious?
In this guide, we explore the natural changes in sleep patterns that come with ageing, and how to tell when increased sleepiness might point to illness, pain, or cognitive decline.
Contents
How Sleep Patterns Change with Age
As pets age, their bodies naturally slow down. Just like older humans, senior dogs and cats tend to rest more, have lower energy levels, and need longer recovery after physical activity. This is a normal part of the ageing process.
Typical sleep time for senior pets may increase to:
16–20 hours a day for cats
14–18 hours a day for dogs
It’s not unusual for senior pets to sleep more deeply or to seek out quieter, undisturbed spots. They may also nap more frequently throughout the day rather than having long stretches of sleep at night.
When Extra Sleep Is Normal
Increased sleep in older pets is usually nothing to worry about if:
They still wake easily when you call or move nearby
They show interest in food, walks, or play (even if less enthusiastically)
Their movement and mobility remain stable
They sleep in predictable locations and follow a general routine
Their behaviour and mood remain consistent
In these cases, more sleep is likely just a sign that your pet is slowing down—not unwell.
Warning Signs Hidden in Excessive Sleep
Not all sleep is equal. Sometimes what looks like extra rest is actually a sign of discomfort, confusion, or illness. Watch for these changes:
Sudden increase in sleep duration over a few days or weeks
Disinterest in meals, toys, or family interaction
Difficulty waking or appearing disoriented when awake
Sleeping in unusual locations, such as hiding behind furniture or on hard floors
Changes in posture, such as curling up tightly or lying stiffly
Moaning, twitching, or restlessness during sleep
These may be early signs of pain, illness, or cognitive dysfunction—and should not be dismissed as "just getting older."
Medical Conditions That Cause Lethargy
Several health issues can cause your senior pet to sleep more or appear more withdrawn:
Arthritis – Pets may rest more to avoid joint pain, especially after movement
Heart disease – Reduced circulation and oxygen can cause fatigue
Kidney or liver disease – These affect metabolism and energy
Cognitive dysfunction (pet dementia) – Can disrupt sleep-wake cycles and confuse day/night
Hypothyroidism (in dogs) – Causes sluggishness and weight gain
Anaemia – Leads to low energy and weakness
Chronic pain or discomfort – Can sap your pet’s willingness to move
Your vet may recommend blood tests, imaging, or pain assessments to investigate the cause of unexplained lethargy.
How to Monitor and Support a Sleepy Senior Pet
To help your pet stay comfortable and ensure their sleep is healthy:
Track daily sleep patterns—note changes in timing or duration
Make their resting areas soft and warm, with easy access
Limit disturbances during sleep, especially in anxious pets
Support mobility with ramps or rugs to prevent joint strain
Offer mental stimulation when awake, such as gentle play or food puzzles
Ensure regular toileting breaks, especially if they sleep deeply or for long periods
Even sleepy pets benefit from routine, gentle movement, and loving interaction.
When to Speak to Your Vet
Contact your vet if your senior pet:
Has become much more lethargic over a short period
Refuses meals or shows less interest in family interaction
Seems confused or disoriented when awake
Has started hiding or changing sleep locations suddenly
Shows any signs of pain, breathing difficulty, or unsteadiness
Don’t wait until symptoms are severe. Subtle changes in sleep and energy are often the first clues to health concerns in older pets.
More sleep is part of the natural rhythm of ageing—but when it comes with other changes, it can also be a call for help. By staying tuned into your pet’s routines and checking in with your vet when things shift, you can ensure your senior companion stays as comfortable and content as possible.
FAQs
Is it normal for my senior dog or cat to sleep all day?
It’s common—but not always normal. If they still enjoy food, interact with you, and move comfortably, extra sleep is likely age-related. But sudden changes should be checked by a vet.
Could my pet be depressed?
Senior pets can develop low mood or anxiety, especially if dealing with pain, sensory loss, or cognitive decline. Lack of interest in activities or sleep disturbances may be part of this.
Can sleepiness be a side effect of medication?
Yes. Some pain relief or sedatives can increase drowsiness. Let your vet know if sleepiness is affecting your pet’s quality of life or seems excessive.
How can I tell if my pet is in pain?
Look for changes in posture, reluctance to move, hiding, irritability, or restlessness during sleep. Pain is often silent, especially in older pets.
Should I wake my pet if they’re sleeping too much?
Let them rest, but try to gently engage them during the day with soft voices, short walks, or treats. If they’re hard to wake or seem confused, speak to your vet.
