Mini and Shadow had another fight...

[beyond_me]

I agree with getting her spayed. I know it will not solve everything, but it helps. When I got my Am. Staff fixed she was a year old and had just gotten over her heat. I totally saw a change in her. We had christmas at my house and she was happy but calmed down a lot fastest after she got spayed. She is still an Am Staff, (I don't have to say more) but it did help.
Also I didn't read everything, but they might have done stuff to each other earlier in the day that you didn't see and they just kept a grudge. I mean did you always get along with your siblings? Dogs just use their teeth.

[beyond_me]

Also I had wanted our Boxer to be the alpha. She is older and I wanted her to teach the Am Staff. We gave the boxer food first, let her walk though the door first, all of that, but the Am Staff is the alpha. She just has a stronger personallity and the boxer let her. I personally though the boxer would never let her, but it works. She was alpha with her jack russel brother growing up, but I think she likes not being alpha now!!!

[howlyip]

Good response beyond_me, you can't decide who is alpha, the dogs figure that out, just make sure you are the alpha over everybody so no matter what they will all listen to you.