Playpen or crate? Dogs Trust says that is the wrong question
The short answer
- Our pick
- A wire crate with a divider, standing inside or attached to a pen. Dogs Trust puts it plainly: it is usually not a choice between the two but a case of using them together. A 36in Ellie-Bo crate is £52.95 and a six-panel metal pen £57.95, so the honest price of doing it properly is about £110, not £40.
- On a budget
- The crate and a screw-fitted stair gate. The gate confines the puppy to one puppy-proofed room when you need more than three hours of containment, and Blue Cross actively prefers a gate to a shut door because the puppy can still see, smell and hear you.
- Don't buy
- Buying a pen so you can leave the puppy longer. It does not work that way. The Royal Kennel Club puts a puppy's fair alone-time at about two hours whatever the enclosure, and a bigger box does not extend a bladder.
On this page
Almost every version of this comparison online is a features list. Crates are portable, pens are roomier, here are six products, buy one.
The useful version starts somewhere else entirely, with a number that appears in four separate places and that nobody puts on a product page.
Three hours
Blue Cross: never more than three hours in a crate. PDSA: never more than three hours, “and be aware that some dogs may not tolerate even that long.” The RSPCA does not give a cap but says an adult dog with good associations is “normally quite happy to be left for about three hours,” and is blunt that “it’s never acceptable to shut your dog in the crate all day while you go to work.”
And then the one almost nobody cites. The Animal Welfare (Licensing of Activities Involving Animals) (England) Regulations 2018, Schedule 4, governing licensed home boarders: “A dog must not be confined in a crate for longer than three hours in any 24-hour period.”
That is not charity guidance. That is the only crate-time figure written into English law, and a person who boards dogs for money can lose their licence over it.
The Royal Kennel Club approaches it from the other side, on alone time rather than crate time: “To expect an adult dog to last more than four hours alone in a house is not fair, to expect a puppy to last this long is even less fair. A couple of hours for a puppy is quite sufficient.”
Put those together and the shape of the decision changes. If your day requires more than about three hours of containment, the answer is not a bigger box. It is a different arrangement — a gated room, a dog walker, someone dropping in. Everything below assumes you have that part sorted.
Dogs Trust’s actual answer
Dogs Trust is the only UK charity that addresses the comparison head-on, and its line is the most quotable sentence in this whole subject:
“It’s often not a case of choosing between a crate and a playpen but rather, using the two together.”
Two arrangements work. Stand the crate inside the pen — but “only if the pen is large enough to house the crate and still have room for stretching and roaming.” Or attach the pen to the crate with the crate door fixed open, so the crate becomes the bed and the pen becomes the floor.
Either way the pen needs a comfortable resting space the puppy can stretch out in, room to move, and the toilet area at least a metre from the food and water bowls. Fresh water in both.
That last requirement is the real argument for a pen, and it is worth stating plainly: a crate has no room for a toilet area by design, and that is the point of it.
Why the crate is small on purpose
The mechanism behind crate training is that dogs rarely soil where they sleep. Blue Cross states it in four words: “Dogs rarely soil their own beds.” Make the sleeping space just big enough and the puppy holds on; make it a spare room and the puppy sleeps at one end and toilets at the other.
Which produces the one flat contradiction in British guidance. PDSA says of crate sizing that “too big is better than too small.” The house-training literature says the exact opposite. Both are right about different things, and the thing that resolves it is the divider panel — buy the crate the adult dog will need, and slide the divider forward so the puppy only has the space they should have now.
There is an important exception to the soil-aversion rule, and it is the one that catches people who bought from a bad breeder. Writing for the British Veterinary Nursing Association, the behaviourist Claire Hargrave notes that puppies form substrate preferences by around twelve weeks, and that a puppy raised in dirty kennel conditions has already learned to soil next to where it sleeps. Standard crate training works less well on those puppies at first, because the aversion it relies on has been trained out of them. Blue Cross flags the same conditional: house training is straightforward “unless your puppy has been raised in dirty conditions.”
If that is your puppy, a pen with a clearly defined toilet area is a better starting point than a snug crate, and you are rebuilding a preference rather than exploiting one.
Sizing, in the words that matter
Dogs Trust gives the fullest version: large enough to stand up, turn around, lie down, sit down, wag their tail and stretch out fully. The RSPCA, Blue Cross and the Royal Kennel Club all give shorter variants of the same. The statutory wording, again from the 2018 Regulations, is “sufficiently large for the dog to sit and stand in it at full height, lie flat and turn around.”
In practice: measure the dog nose to base of tail and add six inches for length, measure shoulder height and add six for height. Then buy for the adult and use the divider.
| Crate | Suits an adult of roughly | Typical UK breeds |
|---|---|---|
| 24in | under 11 kg | chihuahua, yorkie, toy poodle |
| 30in | up to 20 kg | shih tzu, cavalier, cavapoo |
| 36in | up to 32 kg | cocker spaniel, beagle, french bulldog, most cockapoos |
| 42in | 20–34 kg | labrador, golden retriever, boxer |
| 48in | 34 kg and over | german shepherd, rottweiler, great dane |
What each one actually costs
| Item | Price |
|---|---|
| Ellie-Bo wire crate, 24in | £33.95 |
| Ellie-Bo wire crate, 30in | £36.56 |
| Ellie-Bo wire crate, 36in | £52.95 |
| Ellie-Bo wire crate, 42in | £61.16 |
| Ellie-Bo wire crate, 48in | £99.95 |
| Omlet Fido Classic, 24inad | £40.00 |
| Omlet Fido Classic, 36inad | £50.00 |
| Ellie-Bo heavy duty pen, 6 panels at 60cm high | £57.95 |
| Ellie-Bo heavy duty pen, 6 panels at 100cm | £91.95 |
| Ellie-Bo heavy duty pen, 6 panels at 120cm | £110.95 |
| Ellie-Bo replacement pen panel | £28.95 |
| The Range, 8-panel pen, 60/80/100cm | from £54.99 |
| Ellie-Bo lightweight 8-piece pen | from £20.96 |
| zooplus First Class fabric crate, M / L / XL | £29.09 / £38.99 / £48.29 |
Two observations from that table. A pen costs about the same as a crate of the equivalent class, so doing what Dogs Trust suggests is a £110 decision rather than a £40 one, and it is better to know that before the puppy arrives than after.
And the Omlet point, since people ask: Omlet’s Fido range stops at 36in, there is no 42in or 48in, and Omlet does not sell a dog playpen at all. The pens on their site are for rabbits and chickens. If you want the Omlet look, you are buying the crate from them and the pen from somebody else.
Fabric crates are cheap and light and the temptation is obvious. They are fine for a settled adult dog in a hotel room. They are not fine for a teething puppy who has not yet decided whether to chew their way out, and you will find out which kind you have expensively.
Where the crate wins outright
The car. Highway Code Rule 57 requires dogs to be suitably restrained in a vehicle and names dog cages as one of the acceptable methods. A pen has no equivalent status and no role here at all. If you will ever drive the dog anywhere, this alone settles it.
Cage rest. Blue Cross’s guidance on rest after surgery or injury is entirely crate-based: cover half of it so the dog can choose a darker space, keep it in your room during the day so they still feel part of the family, lead on every time they come out. There is no pen version of that advice, because the point is restricted movement.
Settling. The Royal Kennel Club is explicit that closing the door encourages a dog to settle. A pen invites patrolling.
Where the pen wins
When the puppy is not yet house-trained and needs a toilet area in the space. When you object to shutting a door on a dog at all — Purina frames the pen as the option “for many owners who don’t like the idea of using a crate.” When the home is open-plan and the point is that the puppy can see you, which reduces the separation problem rather than creating one.
And in the awkward middle hours: not long enough to need a dog walker, too long for a crate.
Three things that go wrong
Collars catch on crate bars. A dog turning to get comfortable, or sitting up and leaning against the side, can hook a collar or tag on the wire and be unable to free itself. The advice from trainers who have seen it is to take the collar off before the dog goes in, every time, including when they let themselves in voluntarily. It is worth knowing that no UK welfare charity publishes this warning on its crate page — the absence is odd, and we would rather tell you anyway.
Confinement can make separation problems worse, not better. PDSA is direct: “Crates should not be used to manage separation anxiety without professional guidance.” If the puppy whines or scratches, the answer is to go back a stage, not to wait it out. The Royal Kennel Club’s warning is sharper still: “your dog can do itself quite a bit of damage with a crate if not properly introduced.”
Pens get climbed and pens tip. Purina’s line is that “a bored and adventurous puppy can, with a bit of effort, climb out,” and Dogs Trust’s requirement is that the pen be tall enough and secured. Pens ship with ground stakes for exactly this reason; use them.
The third option almost nobody mentions
A stair gate. Blue Cross recommends it specifically over a closed door: gates “aren’t as scary as a closed door as they still allow your puppy to see, smell and hear you,” and the place for one is the doorway of the room you intend to leave the puppy in. PDSA suggests them for the first days, both to introduce the house gradually and to keep a young puppy off the stairs.
Two safety points. A pressure-fit gate should never be used at the top of stairs — it can give way under enough force, and the bar across the base when it is open is itself a trip hazard. Screw-fit, into the wall. And for a medium or large dog, or a small springy one, look for at least 40 inches of height.
Who does not need either
If you have an adult dog who settles in a room, does not chew, is clean in the house and never travels by car, you do not need a crate and you do not need a pen. A crate is a tool for a specific stage, and once the stage passes most people leave the door open and it becomes a bed.
If you are buying one because you have been told all puppies need one: Battersea is the honest voice here, noting crates “are not for everyone” and that “some puppies have a hard time being in a small space.” Watch the puppy you actually have.
And if you are buying one in order to leave a puppy for a working day — that is the one case where the answer is neither, and no amount of panelling fixes it.
What to do next
Once you know which you are buying, the crate size guide covers how to arrive at the adult weight that decides the inches, which is the number both this page and the divider depend on.
If your puppy is a cockapoo, the adult size varies more than the breed name suggests, and the cockapoo crate guide handles that specific case.
Crate-time and sizing guidance is quoted from the RSPCA, Blue Cross, PDSA, Dogs Trust, the Royal Kennel Club and Battersea, all checked September 2026; the three-hour statutory figure is from Schedule 4 of the Animal Welfare (Licensing of Activities Involving Animals) (England) Regulations 2018, which applies to licensed home boarders rather than to private owners. Guidance on puppies raised in dirty conditions follows Claire Hargrave writing for the British Veterinary Nursing Association. Vehicle restraint is Highway Code Rule 57. Prices were checked at UK retailers in September 2026 and move often; the zooplus fabric crate prices were rechecked in October 2026. Nothing here is veterinary or behavioural advice — for a puppy showing real distress when confined, speak to your vet or a qualified behaviourist before continuing.