Catch the Rain: B+LNZ Trials Boost Soil Infiltration
Beef + Lamb NZ funded research has shown that some simple changes to pasture management could help farmers make better use of rainfall and build resilience before dry conditions hit.
Will Halliday, Beef + Lamb New Zealand’s senior manager for technical policy, says a waterproof backpack or container containing lamb covers, iodine spray, bearing equipment, dextrose solution and syringe, gloves, veterinary lubricant, a towel and a thermos of warm water will help give lambs the best possible chance of survival.
He says a 20% dextrose mix can be used as a last resort to revive weak or hypothermic lambs during a cold snap.
Injecting the warmed (where possible) dextrose straight into the lamb’s abdomen will give it the energy boost it needs to survive.
“It is important that this is done before warming the lamb up. If you warm the lamb up before administrating the dextrose, it can hasten its death.”
He says the ideal candidates for this treatment are lambs that are four or five hours old that have not fed off their mothers. Newborn lambs will typically respond to just being warmed up without the injection, although a dextrose injection won’t hurt them.
Halliday says farmers can buy the 20% dextrose solution off their vet. While 20% dextrose is not available to purchase, vets should be able to supply 40% dextrose already diluted with sterile water or saline solution.
He stresses that dextrose is not the same as table sugar and the latter should never be used as a replacement for dextrose.
To inject a lamb, a 5ml or 10ml vaccinating gun should be connected to the draw-off tube or the dextrose extracted using a 60ml syringe. A 10mm 18G vaccinating needle is ideal for this purpose- it must not be longer than 12.5mm.
The dosage is 10ml of dextrose per kilogram of bodyweight. Most lambs in need of this treatment will weigh less than 4kg, so 40ml is suitable dose, says Halliday.
After preparing the injection site with iodine, the needle is inserted just above the navel and pushed in at a slight angle towards the chest. There should be a slight popping sensation as the needle pierces the abdominal wall.
The solution is then gently injected into the abdomen. Any swelling underneath the skin will indicate that the needle is not in far enough.
Another option is to inject dextrose saline (which is not the same as 20% dextrose) under the skin. This requires a much higher dose – 30ml/kg or 120ml for a 4kg lamb – and this is injected under the skin around the ribs on both sides of lamb and the area rubbed.
After the lamb has received the dextrose, it can then be warmed up and put back with the ewe, ideally with a lamb cover. It will need to be closely monitored to ensure the ewe has accepted and fed it.
Energy Boost
Lambs born during a heavy cold snap can exhaust their energy stores just trying to keep warm.
Too weak to feed off their mother, they will starve and die. Injecting a 20% mix of dextrose directly into the lamb’s abdomen can give them the energy boost they need to survive. This technique is known as an intraperitoneal injection.
It can be done by the farmer, on the spot, and gives good results.
Inject lambs with dextrose who are too cold or weak to feed off their mother. You must do this before you warm the lamb.
If you warm the lamb before you ‘fuel’ it, you will hasten its death. Give the injection when the lamb is over four or five hours old. Lambs younger than this should still have enough energy stores to recover when warmed.
It is not a disadvantage to inject very new lambs. It is just that warming them should be enough.' Articles - Beef + Lamb NZ
