have just had them come to the back of our farm we are abotu a mile form the city and they are howling constantly for the first time we have never had the ever before we sort of think its from across the road weer they are puttign a new road in and they are taring down the forest we arent so sure they start to howl right when we put our dogs out( boxer and border collie) my boss said they do a yelp to lure the dogs out and then they kill them is this right?