No, depends what type of bull x you have. My jodie in my signature is 1/4 bull and can catch most qaurry with ease, she wouldn't stand a chance on a daytime hare, she could keep up but not close in but i didn't get her to be an out and out hare retriever. The half cross i owned who died through a major fit at ten month old was also shapeing up well and he could motor, he caught his first daytime bunny 2 weeks before he died, hourses for courses, if everyone liked the same it would be a boring world we lived in.