Wow, thanks everyone. I never thought of the female-marking thing. Mandy does do that a bit, I'll have to point that out to my mom I see that a lot at work, especially with Jack Russells and other terrier breeds. I have noticed that most males at work don't mark if they're neutered. Most just slightly squat, and sometimes hit their front legs. That can be a pain to wipe off, but still, a female just isn't going to work in our house. If we didn't have Mandy it'd be fine, Nova and Luka like any dog. Mandy generally is okay with most dogs, but I think 4 females would be a nightmare. I don't know if I'll ever have this many females again.