so for those who think we should keep her & deal with this problem, what do you recommend? I might rehome the little dog, for her own safety, but most people are so reluctant to do that - until the little dog ends up in the ER again. Crate and rotate. But, not within sight of one another.
I used to physical corrections on her, but now I'm thinking that those probably created this problem or made it worse. Glad you got educated! A recent study has shown that aggressive owners have more aggressive dogs, so that was a very salient point you just made.
the only think I can think of right now for positive reinforcement is to have both dogs on a leash, or Amber tied to a stationary object. Then reward Bella when she is showing calmness & relaxation. reinforcing that Amber is a good thing, not something to kill. I doubt that you will be successful at having them be able to live loose in the same house again (would you dare risk it after a puncture that went nearly to the jugular?) so is the effort really worth it?
Bella is extremely hard to read sometimes though. And, reading a dog is one thing, actually stopping them is quite another.
Just want some recommendations - seems like this thread has turned into 'i'm a bad dog owner' You are NOT a bad dog owner. Dogs are dogs, and they do dog things. The only time I would think of you as a bad owner would be if you took unnecessary chances with your small dog's life now, after realizing how much danger she's in.
please remember that these dogs have been living together with almost no problems for almost 3 years! they were the two dogs that could always be together without any worries. It just really felt like this came out of the blue. I mean if she wouldve went after amber a day or two earlier, or earlier that day then I might wonder, but there was nothing - they were actually playing together like they usually do - which involved Bella rolling onto her back so short stuff amber could play with her. Remember that you said your dog was "hard to read" so there might have been subtle signs that you didn't realize, or it could simply be that one dog is now at an age where DA tendencies tend to materialize. There's a reason that I put a cutoff age on APBT pups coming to my play groups!
more background on Bella, she came from the streets ( found under a car, greasy & dehydrated), yes she probably didn't receive enough socialization - we got her about 6 months old.She was always around dogs though, my friend has 4 and my other friend has 4, so she had 11 dogs ( including our 3) that she was good around. This is not always a socialization issue. It could be a barrier frustration issue (dogs that get antsy behind a crate door often want to "get" the dog that was on the outside. It could be predatory drift, but I'm not inclined to think so. It could be a mature female simply deciding not to like another dog in the household, living up to a genetic tendency toward DA, or feeling competitive about resources (not always food - some dogs are possessive of people, toys, or even space).
She has always been a very 'unsure' dog, lots of submissive urinating for the first year literally if you raised your voice ( firm or excited, didn't matter) she'd pee all over the place. She always has had that attitude like she's not quite sure what she's supposed to be doing. Around us she's good, I've never felt like she would be aggressive towards us. She has rules, she know she has to sit to come in, eat dinner, get love, get on the couch, etc.. Aggression toward dogs, or social behavior toward dogs, exists independently of behavior toward humans. You can't infer passivity or aggression, one from the other.
She has been on a good exercise program ( except for right now because of the rain - but we did have a tongue hanging round of flirt pole this weekend), I've always bicycled, rollerbladed and walked her. almost feel like the first couple years she was just unsure ( the way she'd posture when she was unsure of another dog), and now that she's about 3 years old maybe she's getting more confident but not quite 'right' in the head, like she hasn't gotten it figured out yet, but heck 'I'm a big girl now, so I'm just gonna do it'. I just had a red flag pop up - age three is a common age for dog aggressive breeds to have that switch go off.
I would always describe Bella as being a little 'off'. She basically turns into a puddle if she doesn't know what you want. literally, she'll just start to slump over & go jello on you.
Still waiting on a call back from a trainer. if any one has any suggestions it would be appreciated Trainers who use aggressive methods or corrections should be avoided. Your best bet is really with a veterinary or Ph.D. behaviorist for this serious an issue unless it's a trainer with lots of experience working with aggressive dogs that do damage. Re-read the post about our member who successfully crated and rotated and kept her dogs alive. I suspect you will be in that category of having to decide to do that. With the size difference between your dogs (and even without it) this is not a situation that can sustain another slip up. You will have a dead dog on your hands. Please don't take advice from the wrong people.
BTW, if this was a spat, with no blood, I wouldn't be as emphatic. When dogs bite, and puncture like that, they mean to bite, and they are serious.