The Soay Sheep Chronicles

Yesterday one of our neighbors knocked on our door, distressed that a pregnant Suffolk ewe on his nearby farm had become lame about four days earlier and, instead of getting better, she has declined to the point of not eating.  The neighbor was hoping our experience with Soay sheep would carry over into helping him diagnose his sick ewe.  We did the best we could to help him narrow the possible causes and evaluate whether to send for the vet.  I share this with you because we would use the same thought process were the sheep a Soay ewe rather than a big hulking Suffolk.

Symptoms:  pregnant, lame in front right and back right legs, ate and drank adequately for the first three days of lameness but then stopped eating and drinking water.

Steve and the neighbor talked through all of the following:

1.  The ewe did not show signs of scours or other intestinal issues (no yucky stools dribbling down her back end, to be precise), so no need for ProBios.
2.  The neighbor vaccinates his ewes annually for tetanus so that’s not it.

3.  The fact that the two right-side legs were lame seemed to rule out a rock-in-hoof cause and also probably ruled out spinal injuries.  We have had two Soay sheep who bashed so hard into fences or gates in unavoidable fright that they apparently did injure their spinal cords, but the symptoms in both cases were a single dragging rear foot that eventually healed just fine.

4.  There has been no change in feed source (grass, hay, and grain) for the last several weeks.

5.  Probably not an internal infection because no sign of fever or generalized overheating, no panting, no flailing.

6.  But … our neighbor is not diligent about putting mineral out for the sheep, so the ewes are either getting no selenium, or they are pilfering mineral from the black angus who share the pasture.  If they are getting no selenium, that’s a good bet for a diagnosis, especially in pregnant ewes.  Our ewes gobble down their mineral in the weeks before lambing.  If the neighbor’s sheep are eating the cattle’s mineral, they almost certainly are getting copper, which is in virtually all cattle mineral and which is highly toxic to sheep.

This particular ewe regularly delivers two big healthy lambs destined for market, so we’re guessing the neighbor will spring for a visit to the vet for a professional diagnosis.  Given the dangers of selenium deficiency and copper poisoning, we sure are hoping the vet finds something else, less serious, that is causing the ewe to decline so alarmingly.

Reminder to Soay breeders, especially in the weeks before lambing:  be sure your animals have round-the-clock access to mineral specifically designed for sheep.

For now . . .

Now comes the fun part, working with our lambs instead of endlessly talking about them!

I already used up the “every picture tells a story” line, so let’s just say one of our cooperative new lambs and my trusty digital camera will show you how we work our newborns.   Remember the Lambing Kit?  As soon as our first lamb arrived, the L.K. swung into action.

These pictures star Amado, a twin American ram born last week.  Ready?  Here we go.

Setting the stage:  Steve sits down on the folding camp stool in a small enclosure, picks up Amado, and waits a couple of minutes while mama ewe Willow gets accustomed to sharing her lamb.  The goal is to do everything calmly.  As soon as Steve upends Amado, we learn he is a ram.  I run the portable database (i.e., the lamb card), entering what “lambing” it is, date and estimated time of birth, date of working, gender, etc.

A little KY or vaseline on the thermometer

and voilá - in goes the thermometer.  Do you think the look on Amado’s face suggests he knows what’s coming?  Yuk.

As I mentioned in an earlier post, you need not take a healthy lamb’s temperature.  We do it because we are numbers nuts and also to confirm what the lower end of our “healthy” range is so we will have an indicator of when we have a lamb in trouble.  Amado’s temperature was 102.5 F; he clearly had gorged himself  before we worked him about 9 hours after he was born.

Next Steve puts in the baby eartag, two little bitty pieces of green plastic stamped with a number and applied with a task-specific tool that looks like a paper punch.  We get these tags from a supplier in the U.K. and they are really useful.  They allow us to identify our lambs immediately, preventing any possibility of mixup.  If you are the keeper of the Open Flockbook Project, as Steve is, it simply will not do to mix up lambs.   The little white strap around Steve’s fingers is neither a lamb tether nor a designer collar; it holds the arms of the applicator together in the Lamb Kit to prevent iodine spills and general chaos.

By informal convention, Soay rams have adult Scrapie eartags in their right ears, so Amado’s baby tag goes in his left ear and will stay there even after we install his adult tag (right) when he gets his first tetanus shot at 8 to 10 weeks.  More on ear tags and the federal Scrapie programs in a later post. 

I forgot to take a picture of Amado getting his BoSe and vitamin shots, but that’s the next step in the process.

Then into the sling goes the lamb for weighing.   The scale above is a Rapala fish scale, 50-pound capacity, and the sling below it probably came from Jeffers.  I plan to talk about lamb and adult weights in a later post, so for now let’s just say it is a completely optional step in the process.  If you are new to Soay, let me put Amado’s weight in perspective.  He weighed 4 pounds 11 ounces at the age of 9 hours.  That’s a half gallon of milk and change.  When people brag about their easily-handled Soay, they mean it.  These sheep are small. 

The only part that sometimes upsets the lamb is The Dipping Of The Cord.  Remember the “ahem” caution I gave you in the iodine posting earlier?  As you can see, with ram lambs your aim has to be good:  Steve’s middle finger points to the umbilical cord, his ring finger points to the little guy’s tiny pink penis.

We take one final precaution before we turn the lamb(s) and ewe loose to do a ceremonial turn around the Maternity Ward.  Also not a mandatory procedure, but certainly sound husbandry, we give a shot of BoSe to the new mama for good measure, just in case she became selenium deficient with her in utero lamb filching it from her.  Pressing the ewe to your chest as Steve is doing in this picture eliminates the need to plop the ewe on her rear, the conventional way of working a sheep, when her vulva and her udder are still very tender and vulnerable.

Here is Amado reuniting with Willow in a fun bunch of fresh straw we had put out for Venus (remember Venus, she of the broken leg?).

And to complete the storybook, here are Amado and his twin brother Arivaca headed up to the feeder so mom can get refueled before refueling the twins.

See why we use eartags to identify our lambs?  Can you tell Amado and Arivaca apart?  We can’t unless we pick them up and check their numbers. 

For now …

Anticipation, excitement, and a certain tension are in the air – a sure sign it is almost time for lambing to begin. When we start getting edgy about all we have left to do before the first lamb appears, one of us inevitably asks how we are doing on supplies and equipment. On a rainy late winter day it helps to go through the calming exercise of laying out what we have, taking inventory, and restocking from catalogs or a quick trip to town.  It’s an important event in the Soay Year Calendar.

The really critical lambing “stuff” goes in the Lamb Kit itself, so I will start there – the subset of supplies we actually bring with us as we head out to greet each new arrival.

A brief aside: When Soay breeders brag about how easily their ewes give birth, they are not exaggerating. The ewes just do it, no muss, no fuss. As soon as the lamb is on the ground, the ewe cleans it off, gets it on its feet and encourages it to start nursing. Once the lamb has a full tummy and is producing its own heat, the immediate crises of birth are past.

But because we live in an area extremely deficient in selenium, an essential element, our vet recommends giving both the ewe and her lamb a selenium injection as well as a shot of vitamins. And, because Steve’s focus is pedigrees and tracking genetic characteristics, ear tags also are essential identification tools. The ewe cannot address these issues, so we help out. We have a standard routine we follow with each lamb, usually about 2 or 3 hours after birth or the first thing in the morning after an overnight birth.

And that brings me back to the Lamb Kit itself. Here is what it contains:

• Nitrile gloves
• Iodine for the umbilical cord
• Thermometer
• Portable scale
• Clean rags or towels
• Syringes pre-loaded with selenium and vitamin supplements
• Baby ear tags & applicator
• Lambing cards & pencil
• Flashlight

All of this fits neatly in a rectangular plastic container with a handle that looks sort of like the removable top tray of a tool box only much deeper. We got ours from the local farm store and I think it is designed for use with horses. It has a nifty groove on its bottom side so it straddles the wire fence and can’t tip over, always a plus when you are working with slightly gooey, wriggling new lambs.

Here’s a picture of our Lamb Kit, partly loaded, sitting on a fence in front of one of our sheep shelters.  Cat, contrary to appearances, is not part of the kit.

This post has gotten long enough.  Details on what the various items in the Lamb Kit contribute to the mix in the next few posts.

For now …