Dominant Behaviour

I've a 2 year old alaskan malamute and she is well behved towards people, but I've 4 german shepherds and she hates them, she tries to fight with them so now I ahve to keep them seperate.

I do not know why this happened, she was never fed first, she used to get on with them then for some unknown reason she started fighting.

The strange thing is she is submissive to strange dogs or dogs we meet out on a walk.

She also loves people but she has taken a dislike to a visitor to our home, she growls in her crate when she sees him, which she never does to anyone before.

Can anyone shed some light on how to solve the problem?

without being there to see for ourselves, its pretty hard to say.

at the least, we would need to ask you stacks of questions to get more info on all aspects of your dogs life and previous experience

google APDT UK, UKRCB, or APBC for trainers/behaviourists in your area.
or ask your vet for a referral.
might be an idea to check with your vet to see if their is a medical cause anyway.

Strange i know, no medical problems.

I'm totally mystified, then again thats the canine mind for you

Not necessarily strange at all. if we had a fuller picture, we might be able to tell you if/how/where there are good reasons for it.
which is where hiring a home visiting professional comes in.

for us, you would need to tell us everything about your dog.

have you actually spoken to your vet about the aggression and asked him to check for things such as arthritic pain, injury, hormonal issues?

is she spayed?
how old?
how long you had her?
where you get her from?
have you spoken to the person you got her from?
what her littermates like?
what her parents like?
was she socialised?
what does she eat?
what is her daily routine?
how much exercise?
what sort of exercise?
has she been to training classes?
have you trained her yourself?
what sort of training?
are the other dogs castrated?
do they bully her?
does she feel intimidated?
do the dogs get their own time and space?
do you have a big house?
do you have a garden?
what are the triggers just before the fights?
how do you react?
has anything changed recently?

etc
etc
etc

As I see it - you`ve got 5 dogs and one doesn`t like the others. Is she like that with all dogs?
Are they kept together? Walked/ trained together?
In my experience dogs really aren`t that complicated. If they get some sort of reward for doing something (bark loudly - other dog goes away) they`ll keep doing it! The more important bit of information - why she`s doing this is missing from your post so I agree with Krusewalker - get a behaviourist to come in and assess the situation.
Re. Dominance - I assume you mean pack structure? As your bitch isn`t part of the pack, but an outsider (through her own reactions) I can`t see how you feel she is being Dominant. Frightened perhaps?

Krusewalkers last question is an important one I think,

Has anything changed recently either within the household, your life, your attitude/personal frame of mind etc etc

I think there will be something there, however slight it may appear to you, that has changed that will have triggered this I'm sure. You just need to scrutinise to figure out what it is.

is she spayed? No
how old? 2 years
how long you had her? since she was 9 weeks
where you get her from? From a breeder
have you spoken to the person you got her from? no
what her littermates like? unknown
what her parents like? fine, no problems
was she socialised? of course
what does she eat? dried food (not high in protein)
what is her daily routine? fed at noon, exercised, in house, fed in evening, let out
how much exercise?
what sort of exercise? fetch, obedience, running, pulling bike
has she been to training classes? yes
have you trained her yourself? yes
what sort of training? obedience
are the other dogs castrated? one is, she gets on better with the intact male, and not at all with the females (all unspayed)
do they bully her? no
does she feel intimidated? no
do the dogs get their own time and space? yes
do you have a big house? yes
do you have a garden? yes
what are the triggers just before the fights? she jsut attackes
how do you react? I seperate them or use the water hose, which works
has anything changed recently? no

If I keep her with the pack she will fight with them and they will fight back.

fine around people they can fo anything to her, she will ignore dogs in the street not even look at them, will pass them no problem.

No signs of fear, cowering.

The only thing that has changed is that one of the shepherds had a litter of pups, but she was behaving like this long before the pups were born.

Did her behaviour change after the shepherd got pregnant?

I know dogs are very intuitive and can pick up on such things - I don't know, could that have triggered it?

Two bitches are a problem if they fall out because they won`t back off like a male will. I assumed they were neutered. If they are breeding then that does bring a lot of other factors into it. For safety`sake I`d keep the bitches apart at least.
eta: the behaviour could have been triggered when the other bitch became sexually mature.

Yes it did start when the malamute became sexually mature, I'm i right in saying that spaying her will not make any difference, or possibly make her worse?

We have the space to keep them so that they do not even see each other and still get attention.