I have four dogs, two Chihuahuas (females), one full-sized Doxie (male) and one mixed breed (female, with rottie, GSD, and blue heeler physical characteristics -- who knows?) I also have a very elderly cat (male). All animals are spayed or neutered and in good phsycial health. Our pack has lived together in relative peace for nearly five years and I am the alpha. Although the dogs do challenge each other's pack positions, it is to be expected and it never got violent UNTIL about a week ago. For some reason, the two chihuahuas, normally well-behaved girls, are after each other, drawing blood on three occasions. This happens when I am home, and, according to my husband and son, never when I am at work. I do not know if I should get in the middle of them when they start -- they go from growls to fangs in about five seconds. They seem to fight over favored position, such as on my lap or next to me. Thus far, I have separated them (try separating fighting Chihuahuas and see how easy it is! ), but I do not know what else to do. Any ideas will be much appreciated.