Home / Breeding / Preparing a Whelping Area
Most whelping problems that owners can actually prevent are environmental: a box she refuses to use, a room that is too cold for newborns or too hot for her, bedding that traps a puppy, or a missing pair of scales when a puppy needs weighing. Setting the area up properly, about two weeks before the due date, removes those problems in advance and lets you spend labor watching her instead of improvising furniture. This page is the preparation guide in full. The whelping guide then covers the birth itself, and dog labor stages covers the timing.
Pick a warm, quiet, draft free room where she already feels safe, which you can close off from other pets, children visiting routines and household traffic. She will live there almost full time for the first two to three weeks, and you will spend the first nights within earshot, so a spare bedroom or a quiet corner of a living space beats a garage, utility room with machines cycling, or anywhere with outside doors opening onto the nest. The floor under and around the box should be washable or protected, because whelping and the first weeks are wet and messy despite everyone's best efforts. You need a power socket for a heat source, space beside the box for your chair, supplies and record sheet, and easy access to a sink and to water for her. Visit the room at night before she moves in: if it cools sharply after dark, feels drafty at floor level or carries noise from a road or boiler, fix those things now or choose again.
The box must let her stretch out fully on her side with room for a litter to spread around her, with sides high enough to keep crawling puppies in for the first three weeks but low enough, or with a cut down doorway section, for her to step in and out without jumping and landing among puppies. Purpose built whelping boxes, large rigid plastic pools and well made wooden pens all work; cardboard is a poor choice for anything beyond an emergency because it soaks, weakens and cannot be cleaned. Fit a pig rail inside: a smooth rail running around the interior a few inches out from the walls and a few inches above the floor. When she lies against a wall, a puppy behind her can tuck under the rail and breathe freely instead of being trapped by her full weight, which is a real and preventable cause of newborn loss, especially in large, heavy breeds and deep sleeping first time mothers. Round every edge, check for splinters and protruding screws at puppy height, and wash the whole structure before she ever sees it.
Newborn puppies cannot make or regulate their own body heat until about two and a half weeks old, and chilling is one of the fastest routes to a fading puppy. Keep a warm zone in the box at around 85 F at puppy level for the first days, checked with a thermometer lying where puppies lie, not guessed from the room thermostat. Always heat only part of the box so puppies can crawl away from the heat and she can rest in the cooler area; a mother who is too hot leaves the litter and produces less milk. AKC breeder guidance favors heat lamps used carefully, positioned so nothing can be burned or knocked into the box, and warns that some heating pads can burn newborns; whichever source you use, it must be stable, guarded, thermostatically sensible and checked daily. A chilled puppy is warmed gradually and is never fed until warm, because a cold puppy cannot digest safely.
Think in layers. A waterproof base protects the box and floor. Over it, flat washable layers, purpose made whelping pads, fleece liners or large towels, give puppies grip for nursing and crawling; a surface that is too smooth lets legs splay, and a surface that is too deep or fluffy can fold over a newborn. Have at least three full changes ready so a soiled set can be stripped and replaced in minutes, including at 3 in the morning, and expect to change bedding at least daily in the first week and whenever it is wet or soiled after that. During labor itself many breeders put down disposable absorbent pads over the base layer for the messiest hours, then switch to the proper bedding once the litter is complete and dry. Keep laundry turning over; a damp nest chills puppies and encourages infection.
A perfect box she ignores is worthless, so adoption is a training task for the final two weeks. Feed treats in it, sit with her in it, let her nap there, and praise her for choosing it, without ever forcing her in or confining her before she is ready. Keep other pets out from the start so the area smells like hers alone. Many mothers still attempt to nest in a wardrobe, under a table or on your bed when labor begins; a dog who has happily slept in the box for ten days is far easier to redirect with a lead and a calm voice than a dog meeting it for the first time mid contraction. If she whelps somewhere else despite everything, do not drag her: let the puppy being born arrive safely, then move the family once she is between puppies or finished, carrying puppies warm against your body in a lined box.
After the birth the area settles into its working pattern: warm zone maintained and checked, bedding changed as needed, her water and food within reach so she does not have to leave puppies for long, toilet trips short and on a lead, visitors essentially none in the first days beyond the household, and other animals kept away entirely. Weigh puppies at birth, at 12 and 24 hours, then daily for the first two weeks, as AKC guidance recommends, and write every weight on the record that started during labor. The full daily routine is in newborn puppy care and caring for a dog after giving birth.
Back to the breeding hub, or on to the whelping guide for the birth itself.
By about day 50, roughly two weeks before the due date. She needs those days to investigate the box, nap in it and accept it as her den, so that when labor starts she chooses it herself instead of a sofa or bed.
Warm at puppy level, around 85 F in the warm zone for the first days, with a cooler zone she and the puppies can move into. Newborns cannot regulate their own temperature until about two and a half weeks old, but overheating is also harmful, so heat part of the box, never all of it.
Flat, washable layers that cannot bunch over a puppy: whelping pads, fleece liners or towels over a waterproof base, changed whenever soiled. Avoid deep loose straw, shredded paper and fluffy blankets in the first days, which can trap or smother a newborn.
A pig rail is a guard rail fitted inside the box a few inches from the walls and a few inches off the floor. A puppy that wriggles behind the mother can shelter under it instead of being pinned against the wall. For medium and large breeds it is strongly recommended.
A warm, quiet, draft free room you can keep closed to other pets and visitors, close enough that you can sleep nearby for the first nights, with washable flooring or protection under the box and easy access to water and cleaning supplies.
Clean towels, gloves, a bulb suction device, scissors and thread for a cord, a thermometer, gram scales, your record sheet, a phone, and your vet's number plus the out of hours number written on paper. The full reasoning for each item is in this guide.
This page is general information drawn from the published guidance of the organizations listed under Sources below. It is not veterinary advice, and it does not replace your own veterinarian, who knows your dog. Pregnancy and birth carry real risks for the mother dog and her puppies. If you are worried about a pregnant, whelping or nursing dog, contact your veterinarian or an emergency clinic straight away. For a poisoning emergency, the ASPCA Animal Poison Control Center is on (888) 426-4435 and the Pet Poison Helpline on (855) 764-7661. A consultation fee may apply on the helplines.
Last updated: November 2026. Facts on this page were checked against the sources listed above. How we work: our methodology.