Russia is trying to unravel the mysterious appearance of homeless dogs with bright blue and green fur. They were first seen in remote industrial areas.
Seven dogs with blue fur walked near an abandoned glass factory in Dzerzhinsk, an industrial city near Nizhny Novgorod, 370 km east of Moscow.
Photos of these animals went viral after local media reported on February 11 about a strange pack of dogs.
The plant used to produce acrylic glass and hydrocyanic acid. It is suspected that the dogs at the plant were pumped out in a powdery blue dye.
On February 13, the dogs were brought to a veterinary clinic in Nizhny Novgorod, where they underwent blood and fecal tests.
Traces of Berlin azure, a blue dye, were found on their fur.
Russian media report that the dogs look healthy and eat well. But experts fear that the discoloration could be caused by the toxic chemical copper sulfate.
On February 18, several dogs with bright green fur were spotted near Podolsk, an industrial city 37 km from Moscow.
The dogs were seen near an abandoned warehouse where bags of green powder paint were stored.
But some Russians on social media suspect that the dogs from Podolsk could have been intentionally painted for fun, because the bright blue dogs impressed so many people.
Veterinarians also examined Podolsk dogs. The cause of their green fur has not been definitively established. But, as in the case of Dzerzhinsk, the dogs look quite healthy and friendly.
Whatever the bright color of the fur, these cases point to the constant risk of chemical pollution in Russia, which has inherited many old industrial plants from the USSR.
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