Animal experts are urging strict adherence to welfare standards for hard-working reindeer this holiday season.
As experts in both deer research and welfare, AgResearch scientists have noted the crucial role of the reindeer is often overlooked at this busy time of the year.
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"Between the potentially millions of stops over the course of a night (depending on child behaviour), and a significant weight to haul over long distances, the demands and stress on the animals are huge," said AgResearch animal welfare team leader, Dr Jim Webster.
He said it’s important the animals get regular rest breaks, and access to water.
"All indications are that the owner/sleigh driver with responsibility for these reindeer has a good grasp of his obligations and takes these seriously," said Dr Webster
However, he said anyone who spots the reindeer landing on their roofs or in their backyards should keep their eyes peeled for any signs of distress.”
"Anyone who notices a particularly shiny nose on one of the reindeer should not be alarmed. Our understanding is that this rare condition is not causing discomfort for the animal, and there is no risk of spread to the other reindeer or for children who are out of their beds for a peek."
AgResearch deer researcher Jamie Ward said a major concern is the nutrition available to the reindeer on their busiest night.
"The risk is that high energy offerings left out for the reindeer owner could be eaten by the reindeer themselves, and this can wreak havoc on their digestive systems as they work," he said.
The reindeer have come from a Northern Hemisphere winter he said, consuming a low energy winter diet and high energy food could cause acidosis.”
"If people want to leave something out for the reindeer, our suggestion would be to leave some delicious lichen – it’s what they eat in the wild during winter."
After the holiday season, a new focus of research for scientists will be the potential to add efficiencies to the sleigh operation, including whether sheep or cattle can provide alternative propulsion.