The Corolla wild horses are maybe just a bit too successful in their habitat. The herd is now about 100 head.
That's well over the limit of 60 animals set by Currituck County and wildlife officials. So herd managers are turning to birth control drugs.
This involves shooting the horses with a dart. The darts contain drugs that prevent pregnancy and automatically pop out after the mare is struck.
Last year the herd numbered about 120 horses. An adoption plan decreased the herd by a dozen and another seven horses are set to be adopted soon.
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