The short answer
Puppies cry at night because they have just left their littermates and their bladders are small. Ottawa Humane Society says the first night away from littermates can be very stressful and that puppies under 16 weeks likely cannot make it through the whole night. A workable plan has five parts: exercise and toilet before bed, a crate that is the right size placed close to you, a boring and calm night break, a gradual move later, and no punishment. If crying is constant or comes with vomiting, diarrhoea or lethargy, call your veterinarian.
Key takeaways
- The rule of thumb in two Canadian sources is a puppy’s age in months plus one, in hours, between toilet breaks. A 3-month-old: 4 hours.
- Ottawa Humane Society says puppies under 16 weeks likely cannot make it through a whole night. Plan on at least one night break.
- Put the crate by your bed on the first night, then move it gradually (Ottawa Humane Society). The Canadian Veterinary Medical Association says a bedroom crate is optional.
- A crate must be big enough to stand up in, turn in and lie down stretched out. It is never a punishment.
- Canadian sources differ in tone on crying: do not reward demand barking, and do not leave a distressed puppy to cry it out.
- We found no Canadian source that gives a timeline for sleeping through the night, so this guide does not invent one.
Why a young puppy cries at night
An eight-week-old puppy has left the only home it has known. It slept against its mother and littermates and now sleeps alone in a quiet room with new smells. Ottawa Humane Society describes the first night away from littermates as very stressful. Crying is how a young animal calls for company, and it is not a sign of a bad temperament.
Bladder size is the second reason. The Canadian Veterinary Medical Association (CVMA) gives a rule of thumb of one hour per month of age, plus one, and says a four-month-old can manage five hours without soiling. Ottawa Humane Society gives the same formula, age in months plus one equals hours, with 3 months equal to 4 hours. It adds that puppies under 16 weeks likely cannot make it through the whole night.
| Age | Rule of thumb (months + 1 hours) | Ottawa Humane Society limit in a crate |
|---|---|---|
| 2 months | 3 hours | Out at least every 3 hours |
| 3 months | 4 hours | 3 to 4 hours maximum under 6 months |
| 4 months | 5 hours (CVMA) | 3 to 4 hours maximum under 6 months |
| 5 months | 6 hours | 3 to 4 hours maximum under 6 months |
Read the table as a ceiling, not a target. Ottawa Humane Society sets a lower cap for crating under six months. Your vet can tell you what fits your puppy’s age and size.
Set up the sleeping spot before the first night
Size matters. Both the Ontario SPCA and Ottawa Humane Society say a crate must be large enough for a dog to stand up straight, turn and lie down stretched out. Ottawa Humane Society says wire crates give visibility and airflow and fibreglass crates feel more enclosed, and both should have good ventilation. The Ontario SPCA notes that some dogs enjoy a crate covered with a blanket, and that comfort items should only go in if there is no risk of chewing or swallowing them. Our crate training guide covers the introduction in steps.
- Where: Ottawa Humane Society suggests the crate by your bed on the first night, then moving it gradually. The CVMA says keeping the crate in your bedroom is optional and may keep you both up if the puppy calls for attention. The Ontario SPCA suggests a family member’s bedroom until the puppy is housetrained. Choose the version you can keep up.
- Sound and light: the CVMA suggests a ticking clock or quiet radio and a door left ajar with a dim light. Ottawa Humane Society suggests a ticking clock under a blanket.
- Smell: ask the breeder or rescue for a blanket that smells like the litter. This is our practical tip, not a sourced one.
- Never use the crate as punishment. Ottawa Humane Society says it should feel like a safe space.
The evening routine
Ottawa Humane Society advises putting your puppy in the crate after it has eliminated and been exercised. Keep the sequence the same each night so your puppy learns what comes next. A routine that works in an Ottawa condo or a suburban house alike:
- Play and a short training game to use up energy while it is still light out.
- Quiet time for the last stretch of the evening: a chew and calm cuddles, no rough play.
- Last toilet trip right before bed, at the same spot. Wait calmly and reward when your puppy goes.
- Into the crate with a safe chew or a stuffed food toy, lights low, and a calm cue such as “bedtime”.
On water, Ottawa Humane Society says to remove access during crating if accidents are happening. Ask your vet whether that is right for your puppy, especially in hot weather or for a very young or small puppy.
When your puppy wakes in the night
Treat the first weeks as a toilet-break schedule. Ottawa Humane Society says that if a settled puppy suddenly stirs or whines, take it outside. If it went out recently, ignore the behaviour. It also says to ignore whining that has not been rewarded before, and to use your outdoor cue phrase if it continues for several minutes. The CVMA says not to open the crate or fuss over a puppy that barks, whines or digs, since that rewards the behaviour, and suggests treats while the puppy is quiet in the crate.
The Ontario SPCA takes a different emphasis. It advises against letting a dog cry it out, saying this increases stress and creates negative associations, and notes that crate training is not for every dog. Both can be followed at once. Meet real needs, such as a toilet break, calmly. Do not turn a night break into play. Do not leave a frightened puppy to escalate. If crying is constant and your puppy cannot settle, stop and check for a need, a problem with the crate or a health issue.
The night script is short:
- Lead or carry your puppy straight to the toilet spot, without talking much.
- Wait. Praise quietly when it goes.
- Go straight back to the crate. No play, no cuddle on the couch.
- If crying continues after a recent toilet trip, stay calm, do not play, and check whether something is wrong before you decide it is demand barking.
The 3 a.m. trip in an Ottawa winter
A night toilet trip at minus 25 is a different job from one in June. Keep a coat, boots and leash by the door, turn on a porch or hallway light, and carry a small puppy over icy steps. Check paws for ice and salt after the trip. Our winter guide covers salt, cold and dark walks. In a condo, plan the route to the nearest door so you are not waking neighbours with a puppy at the elevator.
Mistakes that make nights harder
- Making night breaks exciting with play, so waking up becomes fun.
- Skipping exercise and toilet before bed. Ottawa Humane Society advises both before the crate.
- Using the crate as punishment, which Ottawa Humane Society says it should never be.
- Leaving the crate too large. Size it for standing, turning and lying stretched out.
- Changing the routine every night. The Ontario SPCA says every household member should follow the same rules.
- Expecting a full night too soon. Ottawa Humane Society says puppies under 16 weeks likely cannot manage one.
Night crying versus separation anxiety
Night crying in the first days is a reaction to a new home. Separation anxiety is a different problem. Merck (U.S.) describes it as a syndrome in which a dog panics when left alone, with barking, pacing or indoor toileting, often most severe in the first 15 to 30 minutes, and says treatment focuses on desensitization and counterconditioning with possible medication from a vet. The Ontario SPCA advises consulting a positive reinforcement trainer, animal behaviourist or veterinarian if a dog shows signs of severe separation anxiety, such as destructive behaviour, incessant barking, scratching at doors and windows or self-injury. Prevention starts in the daytime; see separation anxiety: prevention beats treatment.
The first week and beyond
Ottawa Humane Society says ideally you should spend the first few days at home with your new dog, and that training should go in small steps. The Ontario SPCA says adjustment may take a few weeks or months. Our guide to the first 72 hours covers the days surrounding the first nights, and house training that works covers daytime toileting. The new puppy hub lists every step in order.
When crying is not normal: call your vet
Call your veterinarian if crying is constant and your puppy cannot settle at all, or if it comes with vomiting, diarrhoea, coughing, not eating, a swollen belly, straining, lethargy or pain when touched. Young puppies can become unwell quickly. Use the first vet visit to ask for advice on sleep and house training, and to confirm how long your puppy can wait between toilet breaks.
Myth vs fact
| Myth | Fact |
|---|---|
| A puppy that cries at night is stubborn. | Ottawa Humane Society calls the first night away from littermates very stressful. Crying is a reaction to a big change. |
| A healthy puppy can sleep through the night from week one. | Ottawa Humane Society says puppies under 16 weeks likely cannot make it through the whole night. |
| You must always ignore crying. | The CVMA says not to reward barking with attention. The Ontario SPCA says leaving a dog to cry it out increases stress. Meet real needs, calmly. |
| A bigger crate is kinder. | Ottawa Humane Society and the Ontario SPCA say a crate needs to fit standing, turning and lying down. More space is not required. |
| The crate should be in your bedroom. | The CVMA says it is not necessary, and Ottawa Humane Society suggests it for the first night. Choose the setup you can keep up. |
Frequently asked questions
Should I let my puppy cry it out?
The Ontario SPCA advises against it, saying it increases stress and builds negative associations. The CVMA advises not rewarding barking with attention. Take your puppy out for toilet needs, keep the break boring, and call your vet if crying is constant.
How long until my puppy sleeps through the night?
We found no Canadian source that gives a timeline. Ottawa Humane Society says puppies under 16 weeks likely cannot make it through the whole night. Ask your vet what to expect for your puppy.
Should my puppy sleep in my bed?
That is a choice. The Ontario SPCA and Ottawa Humane Society both describe a crate in a bedroom for early nights. Our crate training guide explains how to set one up.
How long can my puppy stay in a crate?
The formula is age in months plus one in hours (CVMA, Ottawa Humane Society). Ottawa Humane Society also says under 6 months a puppy should not be crated more than 3 or 4 hours. Treat the formula as a ceiling.
My puppy cries whenever I leave the room. Is that separation anxiety?
Not necessarily. Separation anxiety is panic when left alone (Merck, U.S.). Start with short, calm absences during the day and read our separation anxiety guide. Ask your vet if it is severe.
Keep reading
- Crate training without tears
- House training that works
- The first 72 hours: bringing your puppy home
- Separation anxiety: prevention beats treatment
- Winter with a dog: paws, salt, cold and dark walks
Sources
All links checked October 2026. Sources marked (U.S.) are American.
- Ottawa Humane Society: Tips for dogs (crate training, bringing home a puppy, night routine)
- Canadian Veterinary Medical Association: Crate training for puppy
- Ontario SPCA: Crate training your adopted dog
- Ontario SPCA: Tips for a successful adoption
- Merck Veterinary Manual, pet owner version: Behavior problems in dogs (U.S.)
Keep reading