A llama that has skin tumours receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. The zoo's veterinary hospital uses acupuncture and laser therapy to improve the health and well-being of animals with chronic diseases. (Photo by Ueslei Marcelino/Reuters)

A toucan that has a fractured leg receives electroacupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A toucan that has a fractured leg receives a shock wave treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A toucan that has a fractured leg receives electroacupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A toucan that has a fractured leg receives electroacupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A llama that has skin tumours receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A toucan that has a fractured leg receives electroacupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A llama that has skin tumours receives laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A blue-throated macaw receives acupuncture and laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A blue-throated macaw receives acupuncture and laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A blue-throated macaw receives acupuncture and laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A blue-throated macaw receives acupuncture and laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A Perdiz receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A Perdiz receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A Perdiz receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A Perdiz receives acupuncture treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)

A blue-throated macaw receives acupuncture and laser therapy treatment at the veterinary hospital in Brasilia Zoo, July 30, 2015. (Photo by Ueslei Marcelino/Reuters)