Crate Training a Puppy: An Honest UK Guide

It is ten at night, the puppy has been home for six hours, and there is a large wire box in the corner of the kitchen that you are no longer sure about.

You are not alone. Crate training divides people more than almost any other bit of puppy advice.

So here is the plain version. What a crate is good for, what it is not, how long is reasonable, and two pieces of UK law that give you a benchmark hardly anyone mentions.

If you are in the thick of it, toilet training and chewing are the two things a crate most often gets bought for. Separation anxiety is the one it is most often wrongly used for.

What Is Crate Training?

Crate training means teaching a puppy that an enclosed space is its own bed. Somewhere it chooses to rest, and can settle in with the door closed for short spells.

Done well, the crate is something the dog values. Done badly, it is a box the dog is shut in.

A dog that takes itself off to its crate for a nap has something useful. A dog that digs its heels in at the door and only settles because it has no choice has something else, and calling it a den does not change that. Which one do you want to end up with?

Is Crate Training Cruel?

A crate is not cruel in itself. What matters is how long the door is shut, whether the dog learned to like it first, and whether it is a bed or a holding pen.

A crate used for hours instead of supervision is a welfare problem, however nicely it was introduced.

The people who object have a fair point.

Their worry is not that crates are harmful by nature. It is that they are easy to over-use, that a dog cannot tell you it has had enough, and that shutting the door is convenient for us in a way that quietly encourages more of it.

The other side is just as real. A well-introduced crate gives a puppy a predictable place to sleep, makes toilet training easier, keeps a puppy safe when you cannot watch it, and means a crate at the vet or in the car is not a scary novelty.

Both can be true. The crate is a tool, and it comes down to how you use it.

One claim to be careful with. You will often read that crates are banned in Sweden and Finland, but I could not trace that to any actual law, so it is best not repeated. What is fair to say is that routine indoor confinement is more tightly regulated in parts of Scandinavia, and crates are not part of normal pet keeping there.

How Long Can a Puppy Be Left in a Crate?

No UK charity gives an age-by-age figure. The firmest number around is PDSA’s: never more than three hours, and less for many dogs.

UK licensing law goes further, though it applies to professionals rather than owners. Almost nobody quotes it.

Licensed dog day care in England may not crate a dog for longer than one hour in any eight hour period, and only if crating is already part of the dog’s routine and the owner has agreed (Defra, Dog Day Care Licensing statutory guidance). Licensed home boarding may not crate a dog for longer than three hours in any twenty four, on the same conditions (Animal Welfare (Licensing of Activities Involving Animals) (England) Regulations 2018, Schedule 4).

Nothing stops an owner going beyond that at home. But if one hour in eight is the standard for someone being paid to look after your dog, it is a pretty good one to hold yourself to.

For young puppies, the real limit is the bladder.

Crating a dog all day while you are at work is not acceptable at any age. The RSPCA says so plainly.

What Size Crate Does a Puppy Need?

Your dog should be able to stand without its head touching the top, turn around, lie flat on its side and stretch out fully.

Every guide lists those four. What actually helps in the shop is a tape measure: nose tip to base of tail, then floor to top of head, and add 10 to 15cm to each.

Buy for adult size and use a divider. It is cheaper than replacing the crate twice as your puppy grows.

The divider helps toilet training too. Give a puppy too much space and it will sleep at one end and wee at the other.

How Do You Introduce a Crate?

Make the crate a good place long before you close the door. Only close it once your puppy is choosing to walk in on its own.

Days one to three, door open and fixed back. Feed every meal just inside. Drop treats in when the puppy is not looking so it finds them later. Never shut the door or push the puppy in.

Days three to five, door closed while eating. Close the door while the puppy eats and open it as it finishes. Build up to ten seconds after the bowl is empty, then thirty, then a minute.

Days five to ten, short settles with you there. Settle the puppy with a chew, close the door and sit nearby with a book. Start at two or three minutes and build, and if all is calm, pop out of the room and come back before it notices.

From around day ten, short absences. Leave the room properly, starting at thirty seconds and mixing up the lengths rather than climbing steadily. Work up to half an hour before trying anything longer.

Expect a few weeks rather than a few days. Some puppies take longer, and that is fine.

Two rules throughout. Never use the crate as a punishment, which is the one thing every UK charity agrees on.

And never let the puppy out while it is crying, or you teach it that crying opens the door. Wait for a pause, however brief, then let it out.

Should the Crate Be in the Bedroom at Night?

For the first week or two, yes. A puppy that has just left its litter copes far better when it can see and hear someone.

Moving the crate gradually out of the bedroom over the following weeks works better than starting downstairs and enduring the noise.

If you would rather not have the crate upstairs, a camp bed next to it downstairs for the first few nights works just as well. Not glamorous, but it works.

Dogs Trust, the UK’s largest dog welfare charity, actually prefers a playpen to a crate overnight, because a pen gives more room to move. That is a fair view, and it sits against most crate advice you will read.

Does Crate Training Actually Help?

Here is the admission: nobody has looked very hard at crates in ordinary homes, in either direction.

The best UK clue comes from a study that followed puppies as they grew up. Puppies who slept in an enclosed space overnight before sixteen weeks were much less likely to show separation-related behaviour at six months (Dale and others, Animal Welfare, Generation Pup study).

There is a twist. Puppies who slept ten or more hours a night showed a similar link, and the authors are clear that the sample was small and this shows an association, not proof.

So a quiet, enclosed sleeping spot in early puppyhood looks helpful, though the benefit may be about undisturbed sleep rather than the crate itself.

You may also see one older study waved around as proof that crates are harmful. It found chronic stress signs in Beagles kept under social and spatial restriction (Beerda and others, Physiology and Behavior).

But those dogs spent six weeks in solitary indoor kennels, not in a crate in a family kitchen. It tells you very little about overnight crating.

What Should Go in the Crate?

Comfy bedding, a safe chew, and water for anything longer than a short settle. Keep it simple.

Anything your puppy could shred and swallow comes out when it is alone, and that includes soft toys with stuffing and squeakers. Yes, even the favourite one.

A clip-on bowl stops water ending up on the floor, and a stuffed chew gives a puppy something to settle with.

Covering the crate helps some dogs and not others. If you cover it, leave the front open, watch for overheating in summer, and remember a fully covered crate hides the signals you need to see.

Should You Crate a Dog With Separation Anxiety?

Not to shut it in, no. Closing the door on a dog that is already distressed adds the stress of being trapped to the stress of being alone, and dogs have hurt themselves trying to escape.

An open crate the dog chooses is fine. A closed one while you are out is not.

It all comes down to whether the dog can leave. Our guide to separation anxiety in dogs covers what to do instead.

What If My Puppy Cries in the Crate?

Crying almost always means a step was skipped or the door shut too soon. Go back a stage and shorten the sessions.

Check the obvious things first. Does it need the toilet, is it hungry, too hot or too cold, or has it simply been alone longer than it can manage?

Letting a puppy cry it out is tempting in the small hours, but it does not work. An eight week old puppy left crying does not learn to settle, it learns that the crate is where nobody comes.

Move the crate nearer, shorten the time, and rebuild. It is quicker in the end.

When Should You Stop Using a Crate?

Many owners phase the crate out between twelve and eighteen months, once the dog is reliably house trained and past the chewing phase.

Plenty of dogs keep theirs for life with the door permanently open. That is the ideal ending, not a failure to move on.

Leave the door open, take it away for a week and see whether your dog misses it. Some do.

Crate or Playpen?

A playpen gives more room to move, so it suits overnight use and longer settles better.

A crate is more portable, better for car trips and vet visits, and easier for toilet training because the space is small enough that a puppy will not soil it. Many households end up with both.

If you have the floor space and are choosing one, try a pen with a crate inside it, door open. Your puppy gets a bed it can leave, and you get a contained area.

Getting It Right

Three things carry most of the value here.

Take longer over the introduction than you think you need. The difference between a dog that loves its crate and one that puts up with it is almost all in the first fortnight.

Hold yourself to the standard the law sets for professionals. One hour in eight is what a licensed day care may do, and you are unlikely to go wrong staying near it.

And keep checking whether the crate is still working for your dog. The moment it becomes mainly a convenience for you, it has stopped being a bed.

Arranging pet insurance while your puppy is young gives you the widest choice of cover. Perfect Pet can insure puppies from four weeks old.

Last updated September 2026. This article is general information about puppy training and is not veterinary or behavioural advice for an individual dog.