Every prospective client eventually asks the same question: "What happens when the ewes lamb? Do you have to pull the flock off?"
Short answer: no — but only if you plan for it from the contract stage.
Why operators worry about it
The concern is reasonable. A ewe in active labor needs a quiet, dry, ideally enclosed space. Lambs in their first 48 hours are vulnerable to predators, temperature swings, and getting separated from the mother. None of those things sound compatible with an active utility-scale site.
The fix is not to suspend grazing during lambing. It is to structure lambing so it never overlaps with the array work that creates the conflict.
Split-flock structure
On our contracts we run a two-group structure through the lambing window:
- Production group — open ewes and yearlings stay on the rotation, doing the actual vegetation work the contract pays for.
- Lambing group — bred ewes move to a dedicated soft-fenced paddock either at the staging area near the access road or off-site at a partner farm, depending on contract scope.
This means the site sees zero interruption. Vegetation height stays on spec. The operator gets the rotation report they always get.
Timing the breeding cycle
The trick that makes this work is breeding date control. We breed for lambing windows that do not collide with the operator's high-attention periods — typically panel washing, vegetation inspection, or a planned outage.
For most Michigan solar contracts that means March lambing (off-site) followed by April turnout, or September lambing (in a dedicated on-site paddock if soft fencing is approved by the operator).
Predator pressure
The single biggest lambing risk on a utility-scale site is not the operator's activity — it is coyote pressure. Solar fences are good at keeping sheep in, not at keeping coyotes out. We run two livestock guardian dogs per 200 head minimum, and we keep ewes within 24 hours of lambing in the most secure paddock on the site.
We have not lost a lamb to predation on a contracted site in four seasons. We have lost three to weather. That ratio matters.
What the contract should say
If you are negotiating a grazing contract and lambing is on your mind, the two clauses worth pushing on are:
- A lambing operations exhibit that describes where lambing occurs, whether on or off site, and who pays for what.
- A notification clause requiring 14 days' notice before the lambing group arrives on site, so your O&M team can adjust schedules.
The rest is just trust — and a good grazier will give you references from the operators they have worked with previously.