AKA- so much fail.
The following incident was, both proximately and in the larger sense, the result of failures in handling and managing the dogs in question. In some respects, a case study in stupidity, naivity, and negligence. That said, I would very much appreciate any feedback or advice anyone with more experience could offer on where we stand and where we should go from here.
The circumstances involve a household of three dogs: a 6YO 65lb Black Lab spayed bitch that I have had since she was 6 months old and love dearly, a 5YO 25lb neutered male rat terrier mix that moved in along with my fiance three months ago (quite unruly and demanding- small dog dictator syndrome to the max), and a 50lb 2YO rescue pitbull-boxer mix spayed bitch that we adopted from death row two months ago on the insistence of said fiance, to which I acquiesced against my better judgement despite not having the time to properly study and enact procedures for properly managing and integrating the new dog. I simply (and stupidly) told her it would have to be her project. I have maintained from the outset, in fact, that as far as I am concerned we are fostering the dog until we can responsibly rehome her. I believed and still believe that three dogs is too many for us to comfortably manage.
The incident occurred over poorly managed bones, and the main event involved what appeared to me to be an all out attack on the Lab by the pit mix right in front of me while I was removing a bone from the recalcitrant lab. The pit mix was in full hold and shake mode on the labs neck, but released in response to a bucket of water and obediently/guiltily slinked into the bathroom on my (forceful) command offering no aggression towards me or my fiance in the process.
Fortunately, the lab was uninjured, and it seems all the pit-mix got for her trouble was a mouth full of undercoat- she missed all the important stuff, and the lab is a big strong dog with a heavy coat and thick loose skin around the neck. She was quite shaken up by it though (understatement). It is not lost on me that I can't count on that degree of good fortune next time.
I set up three crates in a row in the living room and the dogs have been only been allowed out one at a time since the incident a week ago. I exercise them in sequence in the morning, and they come out of the kennels one at a time, on leashes. I'm operating with a significant abundance of caution at this point simply to manage the situation in anticipation of evolving to something more sustainably workable that doesn't require us to live like wardens at the supermax.
I did, however, want to ensure that I don't risk a consequential mishap or risk further damaging my Lab, who has always been a sweet and gentle dog both with humans and dogs to this point. The pit-mix generally seems to be a people-oriented dog and hasn't shown any handler aggression in the short time we've had her (although it has become clear that she does need assertive ownership and boundaries- and on reflection we made some serious mistakes in that area along the way), and I definitely wouldn't want any harm to come to her if she is salvageable. With firm guidance, she actually seems to be the most eager to please, tractable, and trainable dog I've ever encountered. While she clearly seeks dominance with other dogs, there was nothing for over the past two months to portend that kind of dog aggression either, and she is actually the most dog-social of our dogs, often snuggling up and engaging in mutual licking with the other two. I kick myself now for the naivete of our having left them all out overnight and when we were out countless times because they all seemed to be getting along so well. I am grateful that if such an attack was inevitable (under the circumstances caused by our incompetence), it happened with me in the room.
My thought is that the most conservative tack would be to responsibly re-home the pit mix via a breed rescue, ensuring that she goes to a single-dog household with experience having assertive dogs, and maintain our Alcatraz protocol until that works out. I certainly don't think I would ever be able to trust the three of them alone again.
That could take a while, though. Is my approach overkill in the mean time? We have implemented something informed by the Leerburg GW recommendations; Is that likely to move us, under the circumstances, towards a point where we could be a bit less draconian? Could the dogs, for instance, be muzzled and walked together? Be allowed out under close supervision with tug lines? Or is the dynamic between the lab and the pit-mix a permanently lost cause? The pit mix has also forcefully dominated the (admittedly impudent) rat terrier a couple of times (and been corrected for it), but my sense has been that she doesn't take him seriously enough to actually attack him despite his petulance (or at least hasn't yet). She also seemed to treat him (and until last Saturday the Lab) with genuine affection most of the time.
I'm unwilling at this point to give up on the pit-boxer mix absent a responsible re-homing opportunity, so we could be doing this for a while.
Also, curious how serious those more experienced with dogs (and especially tougher breeds) think what happened between the pit mix and the lab was. It scared me to death (my first real dogfight experience), and my assumption has been that had I not been there to break it up, I would likely have come back to a dead lab. Is this correct? Or do these things usually break up when one dog submits and the other feels they have made their point? Am I overreacting?
My prior dog experience extends only to an English Cocker Spaniel and said Lab, so, while sometimes obstinate and unruly, easy dogs. Not sure it leaves me well prepared to make informed judgements in this case. As my impression is that this venue seems to have a number of posters with experience working with more challenging dogs, I'm eager for any insights.
Grateful for any advice.