In the latest incident, a cow attacked a man and two women who were hiking in the Dreibündstein region on Sunday near Chur in south-eastern Switzerland, Blick newspaper reported.
The animal first went after the man with its horns, according to police. The two women who tried to escape to get help were then also attacked and injured. Swiss air rescue services (Rega) flew the injured parties to hospital.
Another cow who had recently calved attacked hikers on August 14th on Alp Maises. One woman was injured and a man who came to her aid was also attacked by the cow. The hiking trail leads through fenced pasture.
Bündner agricultural authorities recommend hikers, but also farmers, to stick to certain codes of conduct.
Anyone coming into contact with cattle is advised to keep a safe distance, while calves should not be touched under any circumstances. Also, dogs are to be kept on their leads except in emergencies.