hi bernice, we've adopted a small xbreed (we think min pincher, jack russel and whippet maybe) about months ago from stellenbosch animal welfare. she is extremely loving towards the family (incl 5yr old), but not to visitors. she barks excessively and she's bitten 2 adults (fortunately nothing serious) and tends to 'go' for other children. we think she is very jealous of us and her new house, but do not know how to change her behaviour.