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What size whelping box do I need? Guidelines for a safe birth
How big should a whelping box be? Calculate the perfect size for your dog with our rule of thumb. Find out all about safety and hygienic HPL.
Breeding a litter of puppies is an intense and wonderful adventure. Preparation begins well before delivery, and the most important part of that preparation is the whelping box. The whelping box - also known as a whelping box or maternity box - is the place where the mother dog gives birth peacefully and where the puppies spend the first vulnerable weeks of their lives. One of the most frequently asked questions by breeders is, "What size whelping box do I need?" This is because a crate that is too large or too small can pose great risks. This blog explains in detail how to calculate the perfect size and what a safe whelping box should meet.
Why the right size is vital
A whelping box that is not properly sized for the mother dog can be dangerous for the puppies. If the crate is too small, the mother has too little room to turn around and lie down. The chances of her accidentally standing or lying on top of a puppy are then enormous. On the other hand, if the crate is too large, the newborn puppies may wander too far away from the mother. Pups cannot yet regulate their own body temperature in the first weeks; if they get out of reach of the mother dog and the heat lamp, they can quickly become hypothermic. Then you are immediately talking about an acute emergency.
Common mistakes when choosing a whelping box
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Buying the crate purely by eye ("for a Labrador, a meter will be enough").
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No consideration for the space taken up by the indispensable anti-death rods (anti-platters).
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Choosing a wooden or cardboard crate (these materials absorb amniotic fluid and urine, which is a source of bacteria).
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Making the crate too low, preventing the mother dog from standing comfortably in it or larger pups from climbing out too quickly.
How do you calculate the perfect size? The formula
To determine what size your whelping box should be, measure the mother dog when she is stretched out on her side (as if giving milk).
The rule of thumb for length and width:
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Crate length: Take the length of the dog from the tip of the nose to the base of the tail when stretched out, and add at least 20 to 30 centimeters.
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The width of the crate: At a minimum, the crate should be wide enough to allow the dog to lie fully stretched in width, plus extra room for pups drinking on the belly.
If we translate this into general guidelines by dog size, you can assume the following standard sizes (interior dimensions):
| Size dog | Sample breeds | Ideal size whelping box |
| Small dogs | Chihuahua, Maltese, Dachshund | approx. 60 x 60 x 40 cm or 80 x 80 x 40 cm |
| Medium-sized dogs | Border Collie, Friesian Stabie, Cocker Spaniel | approx. 100 x 100 x 50 cm or 120 x 120 x 50 cm |
| Large dogs | Golden Retriever, Labrador, German Shepherd | approx. 120 x 120 x 60 cm or 150 x 150 x 60 cm |
| Very large dogs | Bernese Mountain Dog, Newfoundland Dog, Great Dane | approx. 160 x 140 x 70 cm or 180 x 120 x 70 cm |
Critical safety requirements for the whelping box
In addition to the proper length and width, a professional whelping box must meet a number of hard structural requirements:
1. Anti-death rods (Anti-plat rods).
These are rods mounted on the inside along the walls, about 10 to 15 inches from the wall and bottom (depending on the size of the dog). When the mother dog lies down with her back against the wall, the puppies can crawl behind her without being squashed. Note that these bars thus snatch about 10 to 15 inches off the effective living space on either side. So when in doubt, always take the crate a size larger!
2. Safe and hygienic boarding
The front of the crate must have a divisible entry or a lowered threshold. The mother dog must be able to get in and out of the crate easily without her heavy mammary glands rubbing painfully along the edge. At the same time, the edge must be high enough to keep the puppies safely inside the crate for the first few weeks.
The Petfort quality standard for professional breeders
At Petfort, we don't compromise on the safety of your litter. Our whelping boxes and puppy pens are built entirely from our hygienic and durable panel system. The walls consist of natural anodized or black powder coated aluminum tubes (20x20 mm) and high quality white HPL, plastic or PP-foam. Fully demountable and easy to store.
Conclusion
Choosing the right size whelping box requires precise measuring. Measure your mother dog carefully, take into account the space for the anti-death bars and always choose a hygienic, foolproof material such as Petfort's bonded HPL system. This way, you offer the mother dog peace of mind and give the puppies the safest start in life. Request a free quote today using our contact form.
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