hello i am a new member and was just wondering if any one could give me any advice on how to make my pup more agressive? she is a first cross collie greyhound, she's 9 and half month old. she is coming on ok but still needing abit of work, and to provide the right training i need some help. the problem is that she lacks with agression if an animal dosent run she is a bit scared to go for it, and personally i want to train her to no matter what once she runs catches up she should have it in her mouth?