We have a German Shepherd and a Staffy, I would trust Jake (the GS) with anyone and anything, however cute as Holly (Staffy) is and as friendly & loving as she is I have seen her catch birds and destroy them, I have seen her attack a hedgehog, she is a Terrier it is what Terriers do luckily she doesn't come into contact with our cats, and our garden is secure enough to stop her getting anyone else's cats or rabbits etc, when we take the dogs for walks she is never let off the lead, but we meet a number of people on walks who let their dogs roam around off the lead, and they look at us as though we are daft when we advise them to keep their dogs away from ours.