I have to agree totaly with wooly shepherd never seen or heard in nearly 50 yrs only time ive seen a fox attack is when a sheep was trapped in a bog,even when ive watched 2 foxs trying to take alamb from its mother they kept well away from her.Dog attacks are differant lots of bites/tearing as they hang on and while a fox focuses on 1 animal (except poultry) dogs or dog go crazy injuring /killing/chaseing