Signs a Ewe Is Close to Lambing: The Final Countdown

The calculator gives you the window. The ewe gives you the day. Learning to read her is what turns a 10-day span of anxious checking into a set of confident calls about who needs watching tonight and who can wait.

Signs arrive in a rough sequence, and the closer you get to lambing, the more reliable they become. Start with your dates, the Sheep Gestation Calculator will tell you when the 142-152 day window opens, then use the animal in front of you to narrow it down.

The timeline of signs

When	What you see
2-3 weeks out	Udder starts filling; ewe slows down
1 week out	Udder firm; vulva softening and swelling
24-48 hours	Pelvic ligaments slacken; tailhead sinks; teats taut and shiny
6-12 hours	Separates from the flock; restless; may refuse feed
1-2 hours	Pawing, nesting, lying and rising repeatedly; mucus discharge
Active labour	Straining; water bag appears; feet and nose

Two to three weeks out: the udder

Udder development (“bagging up”) is the first clear sign. The udder begins to fill and firm as she builds colostrum. In the final days it becomes tight, the teats stand out, and the skin over the udder looks stretched and shiny.

A word of caution: udder development is a useful trend, not a clock. Ewe lambs and shearlings often bag up late, sometimes only hours before lambing, while some older ewes bag up a fortnight early. Use it to sort ewes into “soon” and “not yet”, not to predict a night.

One week out: the vulva

The vulva softens, reddens and swells noticeably. This is the tissue preparing to stretch. Alongside this you may notice her becoming less inclined to move with the flock, hanging back at feeding, and lying down more.

24-48 hours: the pelvis and the tailhead

This is the most reliable pre-lambing sign, and the one most worth learning by hand.

The pelvic ligaments slacken to allow the birth canal to open. Run your hand either side of the tailhead. In a ewe weeks away, the area is firm and full. In a ewe close to lambing, those ligaments soften and the tailhead appears to sink, leaving a hollow either side of the spine, the “dropped” look. It is a distinct physical change and it usually means lambing within a day or two.

At the same time:

• The teats become taut, often with a waxy plug that can be gently expressed to reveal thick, honey-coloured colostrum.
• The abdomen may look as though the lambs have dropped forward and down.

6-12 hours: behaviour changes

Behaviour becomes the best signal. Look for a ewe who:

• Separates from the flock and seeks a corner or a quiet spot against a wall.
• Goes off feed, a ewe who ignores concentrates when the rest of the group charges the trough is telling you something.
• Is restless: standing, lying, standing again, circling.
• Vocalises, low, soft, directed nickering, often at nothing. She is talking to lambs that have not arrived yet. It is one of the most telling signs there is.
• Curls her lip or looks at her flank.

The final hour: nesting and first-stage labour

• Pawing at the bedding, scraping out a hollow.
• Lying down, stretching a hind leg out, getting up, lying down again.
• Clear mucus discharge, a string of mucus from the vulva means the cervix is opening.
• Visible straining and contractions, initially intermittent.
• The water bag appears, a fluid-filled sac protruding from the vulva. Do not break it.

Then, in a normal presentation: two front feet, soles down, with a nose resting on or just behind them.

What normal progress looks like

• Once hard straining begins, an unassisted mature ewe usually delivers within about an hour; ewe lambs may take somewhat longer.
• Subsequent lambs typically follow within 10-60 minutes of each other.
• The ewe should get up, turn, and start licking within minutes.

When to intervene

Knowing the signs of normal progress is precisely what tells you when things are abnormal. Call your vet, or get experienced help, if you see:

• Hard straining for more than 30-60 minutes with nothing showing.
• The water bag has been out for an hour with no progress.
• Only a head visible with no feet, or one foot and a head, or a tail first.
• Two feet with soles facing upward (a backwards lamb), this can be normal-ish but needs prompt handling.
• The ewe stops trying, she has strained, then given up and looks exhausted.
• A prolapse, before or after lambing.
• Any foul-smelling discharge, or a lamb that is discoloured and dry-looking.

The rule of thumb many experienced shepherds use: if she has been genuinely straining for an hour and there is no lamb, something is wrong. Do not wait it out overnight and hope.

Building your watch list

The practical routine that saves the most sleep:

1. Use your service dates to identify the group entering the window this week.
2. Once daily, walk the group and check tailheads and udders by hand.
3. Draft the “sunken tailhead, tight udder” ewes into a close-watch pen. These are the ones that need overnight checks.
4. Leave the rest alone. Constant disturbance of ewes weeks from lambing does no good.

That single act of drafting, separating the imminent from the merely pregnant, concentrates your attention where it earns something, and it is the difference between checking eighty ewes at 2am and checking six.

A note on triplets and singles

Ewes carrying multiples typically lamb one to two days earlier than single-bearers, and they often show signs more emphatically, a bigger udder, a more obvious drop. If you have scan data, put your triplet-bearers at the front of the queue and check them first.

This article is general husbandry guidance, not veterinary advice. If a lambing is not progressing normally, contact your vet.

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Plan your lambing dates: use the free Sheep Gestation Calculator to turn a breeding date into an expected lambing date, a 142–152 day window and a full milestone timeline. Estimates only, always consult a veterinarian for animal-health decisions.

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