Goat Gestation Calculator

How to use the Goat Gestation Calculator#

1. Enter the breeding date. Use the date of mating, or of insemination.
2. Check the length. Leave the average, or enter your vet’s figure for the breed.
3. Read your dates. You get the expected date, the likely window and your goat’s progress.

How long is a goat pregnant?#

Gestation averages about 150 days, with a normal range of about 145 to 155. Does carrying twins or triplets sometimes kid a little earlier, and some breeds run slightly shorter or longer.

Getting ready for the kids#

In the last month, a doe needs extra feed to support the kids, but not so much that she gets too fat. Talk to your vet about worming and vaccination before kidding. Prepare a clean, dry pen with fresh bedding and keep a kidding kit with towels, iodine for navels and a thermometer.

Call a vet if she is in hard labour for more than an hour without progress, or if a kid is presented in an unusual position.

Why the date is a window#

Does usually kid between day 145 and 155, with 150 as the average. Twins and triplets tend to come a little earlier, and some breeds run shorter or longer, so start watching from day 145 and don’t treat day 150 as a deadline. This calculator is a planning tool and doesn’t replace veterinary advice.

A worked example#

A doe is bred on Tue 14 September 2027. With the 150-day default the kids are due on Fri 11 February 2028, inside a window that runs from Sun 6 February 2028 to Wed 16 February 2028. Half the term is over on Sun 28 November 2027, and the final stretch starts on Thu 20 January 2028, day 128.

Dairy breeds such as Saanen and Nubian are usually close to 150 days. Miniature breeds can come a little earlier, so if you keep Nigerian Dwarfs or Pygmies, trust your own records over the average once you have a few kiddings behind you.

Feeding does through the last six weeks#

Most of the kids’ growth happens in the last six weeks, which here starts around Fri 31 December 2027. A doe carrying twins or triplets has little room left for feed, so she may need smaller, more energy-dense meals than before. A thin doe in late pregnancy with several kids is the classic setup for pregnancy toxaemia, sometimes called ketosis. Dullness, going off feed and standing apart from the herd are reasons to call the vet the same day.

Ask your vet about the timing of the clostridial booster, which is usually given about four weeks before kidding. In this example that is around Fri 14 January 2028.

Recognising kidding in the last days#

The udder fills out, often called bagging up, and the ligaments beside the tail soften until they are hard to find. The doe becomes restless, paws the bedding, talks to her belly and may stop eating. Many keepers move her to a clean, dry kidding pen a few days before the earliest date in the window, not on the due date itself.

Once she is pushing hard, a kid normally arrives within about half an hour. If she has strained for that long with nothing showing, or you see only one foot or a tail, call for help rather than pulling.

Kids should nurse within the first hour or two. Colostrum in the first day, at roughly a tenth of the kid’s body weight, gives them the antibodies the doe cannot pass through the placenta.

Keeping a kidding record#

Write down the breeding date, the buck, how many kids were born and the day they came. Over a few seasons you will see whether your does run closer to 148 or 152 days, and you can use that figure in place of the average. Weigh the kids at birth too: a doe that regularly delivers small kids may need her feed reviewed in the last six weeks.

Making sure the date is real#

Does can be bred more than once if the buck is left with them, so keep a note of the first and last date you saw her being served. If you only know a range of days, enter the earliest and read the window as running later. A doe that gets to the end of the window with no udder development at all may not be pregnant, and a vet can confirm with ultrasound.

Last reviewed October 2026 by the Calclulo team.