Need advice about my GSD - Page 3

GSd is loyal, does not and should not attack and kill one of its own pack.

The dog's a *dog* -- they're naturally predators!  Anything that counts as as prey species (livestock and other small animals) can be a target.  GSDs and other dogs can learn to live with other animals peacefully but they usually have to be carefully taught that from an early age unless they're abberant and lacking in prey drive. A dog that's lacking in natural prey drives will also lack other drives and be useless for work. (It's not just protection work -- herding is a refined, modified version of prey drive and there are plenty of herding breed dogs (Border Collies, Australian shepherds, Kelpies, Australian Cattle Dogs, etc.) that will run off the rails and kill livestock instead of just herding them.  That's the original instinct coming out and means the dog needs to be rehomed, but it's not a flaw, it's a natural normal part of the animal! Terriers are great vermin killers, too, so it's no surprise when the family gets a terrier and it eats the kids' rabbit or hamster.)  

Small dogs can also trigger off prey drive in other dogs, particularly if they're tiny. My older GSD is dog social and tolerant but the neighbour's chihuahua running elicits an intense "watching" response like hares or ground squirrels.  I'm always careful to call him away and leash him if we see the chi running loose because I don't want any nasty accidents though they'll meet and greet without incident and play on leash.  What the OP was describing was possibly prey drive or possibly dog aggression. The small dog was aggressing at the big one first, and the big one reacted.  My experience with GSDs (working bloodlines though not necessarily deliberately bred in the sense of having traceable pedigrees) is that they might not start a fight, but they won't back down from one, and they *will* finish it. The size discrepancy unfortunately means that in this case there was a dead dog instead of two dogs who needed trips to the vet to fix some wounds. The fault lies with the humans on both ends -- they should not allow dogs to fight.  (As an aside I don't know where small dog owners get off thinking it's cute to let their dog -- usually not leashed or under control -- harass mine. I warn them that I don't expect him to put up with any shit, and if their dog dies it's their fault, but they still don't seem to take it seriously. My dog's tolerant but I've punted more than one snapping horror off my guy.)

That dog is a danger to live near to human.

Agreeing with everyone who said absolutely not. Predatory behaviour isn't usually directed towards humans (though it can be -- there's more than one dog who has injured or killed a newborn, which is why dogs of any breed shouldn't be left with babies unsupervised).  What this dog was perfectly normal predatory or possibly territorial behaviour directed towards an appropriate target, and it doesn't mean that the dog is in any way dangerous to humans. As an aside wolves don't tend to predate humans either, which might be why primitive dogs were easily domesticated from them.

To the O.P. -- I'm very sorry you've been through this. It's a horrible situation to be in, but it's not in any way the dog's fault.  She's behaving according to her nature and as a responsible person you (and the other humans) need to manage so that everyone is safe.  The dog should have her own space which is secure from the other animals so that she can't get at them, and they can't get at her.  That doesn't mean she should be locked up permanently or muzzled, just that she should have a private secure place of her own to rest. When she's loose with other animals a suitable human (i.e. someone she would listen to, not a stranger or small child) should be supervising to interrupt or call her away if any untoward activity is happening.  She also needs proper outlet -- exercise, regular human companionship, training and activities to engage her mind, and to teach her boundaries.  If you structure her life to manage the potential trouble spots then no problems will result.  It's the merry "hands off let everything else sort itself out and be fine" approach that's the source of the problem. If you can't or won't do the work then rehome the dog to someone who understands she shouldn't be allowed near livestock.  If you do that take some friendly advice and don't get another dog, because you can't expect any dog (whether it's a Golden Retriever or a Dachshund) not to go after livestock and other small animals without training and appropriate supervision.

you asked for this sorry but you let let your mothers dogs attack yours every time they saw her? you are suppose to punish them or Not let them have contact with your dog in order to prevent your much much much larger dog from chomping them down? Or just ruining your dogs temprament and creating a moody bitch which you already did. You created the monster now live with it. SHe probably got fed up and took it out on your poor goat because you didnt have the guts to stand up to your stupid mother.

op has to be a troll they cant exist no one is that stupid

The misconception that the dog should just know how to behave (without any training or effort from the humans involved) is all too common -- trainers, vets, and shelter workers call it "Lassie syndrome".  People expect to have the dog behave the way they want because they want it, not because it's a reasonable expectation.  I've had people admire my dog(s) and complain that theirs are stupid/hyper/don't listen/etc. and it's *always* attributable to the fact that they haven't bothered to work with the dog, don't exercise it, and often don't have structure and self discipline in their own lives.