Dogs of an unnatural hue have been spotted running around the Chernobyl exclusion zone .

According to two Instagram posts uploaded by non-profit organization Clean Futures Fund – one a series of photos , one a video – three dogs have gone from having normal, dog-colored coats to a distinct, bright blue tinge.

"We do not know the reason and we are attempting to catch them so we can find out what is happening," Clean Futures Fund wrote on Instagram . "Most likely they're getting into some sort of chemical."

Related: Wild Pigs Turn 'Neon Blue' in California, Triggering Warnings

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The culprit? Nothing weird, actually, although maybe a little gross: as the non-profit told Storyful , they think

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