Hi I've had a girl chihuahua for about 2 years now and I barely got another chihuahua(a boy). The problem is that when we tried to introduce the new boy dog my girl chihuahua started growling at him and jumped on him. What can I do for them two to get along? Also can anyone give me tips on how to stop my girl dog's growling? She growls at us whenever we get near and we can't seem to figure out how to make her stop. Any help at all would be appreciated.