Animal rights activists in Germany have brought in a bull to try to recapture a runaway cow facing a hunter's bullet.

Yvonne has been roaming free in the Bavarian forest since escaping from a farm near the town of Muhldorf in May.

However, after she bolted in front of a police car, officials say she poses a danger to traffic and hunters have permission to shoot her.

Yvonne's supporters hope the appeal of Ernst the breeding bull will let them get hold of her before the hunters do.