23 donkeys work with Alzheimer's patients and children with problems.
Walking into a dusty paddock, a young nurse is quickly surrounded by a group of donkeys gently nudging her for attention as she strokes their soft noses and feeds them carrots.
When someone places a 10-day-old colt in her arms, Monica Morales squeals with delight, visibly relaxed after a few hours unwinding at El Burrito Feliz -- "The Happy Little donkey" -- an association offering free donkey therapy sessions to medics fighting the virus.
Known as animal-assisted therapy, such encounters can help with a range of physical and mental disorders, including stress, depression and anxiety.
Although such therapy is more associated with horses, experts say donkeys are better suited to helping mental or emotional disorders given their gentle nature and intuitive respect for personal space.
Located by a sprawling forest on the edge of Andalusia's Donana National Park in southern Spain, El Burrito Feliz is a non-profit association with 23 donkeys that have worked with Alzheimer's patients and children with problems.
The "Doctor donkey" project began in late June as a way of offering respite to frontline workers battling a virus that has killed some 33,400 people, infected more than 900,000, and left medics traumatised and exhausted.
Japanese forest therapy
"The huge stress created through the daily struggle with Covid-19 exhausts them, so here they can be strengthened through therapy with the donkeys," explains Luis Bejarano, 57, who runs El Burrito Feliz.
And the risk of falling ill is very real, with one in 10 of Spain's healthcare workers getting infected -- twice that of the general population and one of the highest rates in the world.
After an hour wandering through the forest with a donkey called Magallanes, she admits to feeling a lot more relaxed.
After befriending one of the donkeys, a visitor will go on a guided walk and when confident, they can go back into the forest alone with the donkey and stay as long as they like.
Back at base camp, they prepare food for the animals, and then there is the option of a "donkey bath" -- entering the paddock for an immersive experience with the herd.
By being in a forest and having contact with an animal, "something happens that allows you to express yourself with another being that does not judge," she told AFP.
Studies show that animal-assisted therapy triggers changes at a physiological level, activating oxytocin, conected to experiencing pleasure, increasing endorphins and reducing cortisol in the blood which is a product of stress, she said.
At her surgery in Madrid, Dr Nieves Dominguez Aguero, 49, has a pencil sketch of a nurse nuzzling up to a donkey by Cuban graphic artist Ramses Morales Izquierdo as a reminder of her visit in summer.
Talking about the horrific memories of spring still moves her to tears as she recalls patients left in the corridors because of the lack of beds and those who died without being able to see their loved ones.
Spending a few hours with the donkeys was surprisingly helpful.
So far, 25 doctors and nurses have visited the project, although the pace has slowed as cases have spiralled and Spain's medics have found themselves battling one of the highest infection rates in the European Union.
Although the project was only supposed to run until November, Bejarano is extending it and even considering installing lodgings so people can stay overnight.
World-renowned British primatologist Jane Goodall says the coronavirus pandemic was caused by humanity's disregard for nature and disrespect for animals.
The study was aimed at identifying which animals are vulnerable to the virus so they can be used to test experimental vaccines to fight the COVID-19 pandemic, which has killed more than 90,000 people worldwide since it emerged in China in December.
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