Originally Posted by MadLab
Muzzle the aggressor. A fabric muzzle is something that lets the dog know it can't bite and it doesn't look too bad.
I feel there must a problem with the pack structure that you are not alluding to in your post or it may be a physical problem as has been suggested. Is there any other strange behavior that you think is relevant.
I've seen females fight and they can just switch on and off really quickly. You screaming is not going to help. It will probably make it worse as does prying them apart as the biting dog bites harder when it is pulled from behind. Better to choke her to release or pull towards the other dog to trigger an opposition reflex away from the bite.
How do you interact with the 2 dogs. How often do you walk them. Are there any games you play with them. Do they resource guard toys or food?
Unusual stuff... we recently moved, so tensions and stresses may be higher than normal. However, this problem started happening a long while ago before anything involving moving, so I don't know how to think about that, except maybe chalk up increased stress as a danger factor?
Abby has been getting extra attention since the last attack injured one of her forward legs, so this is sorta a soon after the last event kinda thing, but before that there was a good long time without any problems enough that even I was starting to think maybe it'd been worked out/fixed. I don't know if the extra attention Abby has been getting as she healed contributed to this too? She was nearly recovered so that had also tapered off a bit and things were very nearly back to normal also.
Abby generally gets most of her exercise through fetch/retrieval games. She gets very very into her retrieving and will run herself till she's good and tired chasing things and it's just what she likes to do, so we do that with her more. Tika can also do that sorta, but she has a habit of not wanting to let go of whatever you just threw. She'll go get it, bring it back to you, then not want to give it to you till her attention span runs out usually several seconds later when she'll finally drop it.
Tika gets more of the traditional walking, and we try to do that at least once a day or failing that every other day. There are also various dog toys around the house that she occasionally chews on, or we occasionally toss for her or Abby.
Tika does tend to be interested in what Abby is doing, in that whatever Abby is doing she wants to do too. So Tika doesn't tend to "ask" for ball tossing, for example, but if she sees Abby get the ball tossed she will want to join in so we toss toys to her too in those cases.
She is the same way about the food in a sort of weird way. There are two dog dishes for food, and when the food gets put in them she waits to see which one Abby goes for and then wants to eat out of that one. Once she starts eating if Abby switches bowls she'll stick with the one she's currently eating out of, but till then there is that weirdness there. Also to clarify she's not aggressive or mean about it, she doesn't scare Abby off of whichever bowl of food, she just seems to want to share it.
Both dogs get regular attention and pets from me and my mom and my dad. Both dogs are also pretty much free to come hang out in my room when I'm up there, and are free to jump up on my bed and relax or whatever while they hang out. Sometimes one does, or sometimes they both jump up there, and there hasn't been any problems with that thus far apart from needing to clean the sheets more often. Abby was snoozing on the ground when things went bad this morning, so I don't know what was up with that. Both dogs have been in my room fairly often, both before we moved and since we got to the new place too.
They also generally like to sleep or nap near each other, or at least know where each other is. Tika will look around for Abby if she hasn't seen her in a few minutes and vice versa.
We have two kennels/crates/cages that they're comfortable enough with to sleep in, and will go into if we tell them to "kennel up" though they've been sleeping just around the house for the most part for the last several months. I guess that's a change, but again this problem pre-dates that change as well. They are still comfortable sleeping in there if need be, or if it becomes needed to have them in there because people are working around the house or one of them did something bad. Tika is out there now.
Other stuff.. *thinks* Tika is a very "Where her people are" kinda dog usually. If you get up to go to the next room, she'll get up and follow. If you sit down, she'll plop down somewhere. If you get up to back to the previous room she'll follow. She just wants to be where you are all the time. Abby is a little more laid back about that stuff. She's more ok hanging out if you leave the room or go upstairs or whatever, though she'll eventually come looking for you too after a bit, and both come running when called.
That's all I can think of at the moment, I may enlist the aid of the rest of the family here for further infos if needed. I'm sorta still frazzled and somewhat exhausted so I again apologize for the random and disorganized responses.
In any case thank you to everyone giving their input. It's greatly appreciated.
[Edit] Oh, and I realize I probably didn't react in the best way to the attack that happened this morning, but in my defense I was half-asleep and mostly exhausted, and caught completely by surprise. Abby yelping and screaming didn't help and with the size difference in the dogs I feared Tika might kill Abby so I pretty much just reacted and pulled her off. I will try to remember your advice if I find myself in the middle of another attack, though I hope I won't have to and can find a way to prevent it. But again thanks in any case.