she goes like a bat out of hell and leads the chase for them both doubled and single she is all over them but she just will not take them. ive ran her doubled and she runs them all over the feald till the other dog takes them and i ran her on her own and she was all over it but took a long time to take it and when she finly did she didnt realy want to know she was dragging it about by its tail but every time it turned round she let go then grabed it by the tail again after about 5 min she did grab it by the back and give it a shake but then left it.(it was not dead)