We have had cats for years and a Labrador for 12 years till she died a few years ago and we never had any trouble with the animals mixing. We have always looked after a relative's Lab when they went away and again never had any problems. We are presently looking after their 10 month old bitch who is hell bent on going for our cats. She is a really feisty animal, really bouncy and exuberant and we don't dare let her near the cats. How can we overcome this and calm her down as we will be having her to stay fairly regularly from now on.