i am new to the hunting life and am tottally a rabbit and rat man using dogs my lurcher collie whippet bedlington brings rabbits back live to hand and unmarked.yet kills rats instantly.she seems to differenciate.my friend refuses to take his whippet ratting as he believes it will make her hard mouthed is he correct,and my bitch an eception,or does it depend on the breed of dog,?am i right in thinking that a small splash of collie enhances the brains