New signs have been installed at Northam Burrows to remind dog owners of the risk to livestock.
New signage has been installed across a historic North Devon common following a series of incidents where dogs have disturbed wildlife and livestock.
Torridge District Council said the measures at Northam Burrows were necessary to protect the "vulnerable" sheep and horses that graze the land year-round.
The park is a historic grazing common where residents have held ancient rights to graze animals for centuries.
While the council said dog walkers remain welcome, the Ranger Team has urged owners to keep pets under "close control."
The warning comes as lambing season begins, a period where officials say the flock is at its most significant risk.
"Stress caused by dogs can lead to miscarriages in ewes, and lambs are especially vulnerable to attacks," a council spokesperson said.
The new signage was part-funded by the Northam Burrows Charity.
Councillor Lyndon Piper, Lead Member for Leisure, said previous awareness campaigns had helped reduce incidents, but "heightened care" was still required.
"It is essential that dogs are kept under close control," he said. "With lambing season in full swing, I would like to remind all dog walkers to continue acting responsibly."
The council also highlighted recent changes to the law regarding livestock protection. Owners of out-of-control dogs now face:
Anyone who witnesses an incident of livestock worrying is encouraged to report it to the police via the 101 non-emergency number.
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