agressive toward people

Has you dog had any obedience training?  Maybe get him into some obedience training or seek out a trainer?

So, have you thought of asking the kids to stop picking each other up, running and screaming?!
 

first of all, if you read my post you will see that theres a lot more to it than just the kids spritdogs.  to answer your question, yes, of course.  we re talking about a room full of 5-7 year old girls.  they forget.  and if even if they arent screaming, 6-10 girls ages 5-7 years make a LOT of noise and horseplay even if they are trying to be calm.  its much safer for everyone to simply keep the dog in my room with the door closed when my kids have friends over.  do you any answers/advice to my question?

Well Some Chihuahuas can be temperamental (grumpy, haughty, nasty when provoked) and since your dog is part Chihuahua that is probably coming through when it is doing thing like this. I have seen a lot of Chihuahuas act like you have describe Jake been doing even though he is part Chihuahua.

ORIGINAL: spiritdogs
So, have you thought of asking the kids to stop picking each other up, running and screaming?!

Is this a serious question?  You are suggesting a 15lb dog dictate the behaviors in the house and call it a day?

Frankly this is why so many dogs end up in shelters.  Because the behavior that starts out small becomes so big that the family has to adapt to the dog which becomes unreasonable and viola! dog ends up in shelter or rehomed.

Although in some homes dogs are the central focus, the reality is that in 90% of dog owning homes the dog is a secondary member of the family no matter how loved simply due to time and priority restraints.  Whether one agrees with that or not, is not the point.  The point is to help the owner and dog so that everyone benefits and real life can go on in harmony.  The dynamics of children in the house are never going to change so there needs to be a compromise somewhere.

I would suggest contacting a behaviorist or trainer that does home visits.  He/she will be able to evaluate the behavior as it's happening and hopefully offer some steps to defusing it right there on the spot and with the whole family present.  They will also hopefully have some recommendations for classes that will be appropriate for this particular dog. 

Guests to the house should be respectful of any pet in the family and the dog should be taught to adapt to guests as a normal part of life.  Any forcing of either side will only be a band-aid on the situation.

oh by the way, its adults picking up the kids, and im not going to tell fathers they can no longer pick up their daughters in my house, especially my daughters father!

If it were my dog she'd be seeing a behaviorist ASAP.  I have zero tolerance for dogs that go after people (I'm not saying put him down or anything, just that he needs to see a professional).
 
 

See, THIS is the problem with dogs and children under 10.  And especially LITTLE dogs.  And, BTW, kids under the age of 10 should NEVER be unsupervised with ANY dog.
 
IME, little dogs are more nervous to begin with.  They are LITTLE.....even children look like giants to them.  Then you add in all the screaming that children do, all those gawd awful high pitched noises, and yep, the dog is definately going to react.
 
Anne asked a perfectly VALID question.  I personally can't stand the noise of a bunch of children screaming and carrying on...especially little girls.  I suppose if I'd had any girls I would have gotten used to it, but I well remember tearing outside in my pj's at 6AM because my neighbors girls were screaming blue murder....I thought for sure someone was SERIOUSLY hurt.  Nope, they were playing.  But these were EAR PIERCING, BLOOD CURTLING screams that woke me from a dead sleep and scared the crap out of me.  Now I'm a grown person.  Imagine what that sounds like to a small dog??  And then factor in that small dogs tend to be more nervous to begin with AND they also still feel the need to try to protect......well, that's what's happening here.
 
I don't neccessarily think that a behavorist is needed, but I DO think some serious postive reinforcement training classes are an absolute MUST and right away.
 
 

Start obedience training immediately.  It does not matter that he is small, it matters that he has poor socialization, limited respect for the humans in his life and feels he can and should do these things.  Although the use of the other room is good management to keep things safe during visits, it does not help the dog learn new behaviors.  You might want to look up Nothing In Life is Free on the net and start implementing those strategies at all times by all humans in the family.  Three to four training sessions of 5-10 minutes daily will also help.  A possible book references is the Complete Dog Training Manual put out by the ASPCA and written by Bruce Fogel DVM.  Two page lay out, short well written steps and photos for illustration.

ORIGINAL: glenmar

Anne asked a perfectly VALID question. 

 
The validity of the question is, at best, arguable, but it certainly isn't very PRACTICAL to expect a room full of little kids to be quiet and still, is it?
 
Frankly, I found the question uncharacteristically, for Anne, unhelpful.  Of course, there is a distinct possibility that I am just too dense to get her point.  []

thanks everyone for your advice/input.

we re talking about a room full of 5-7 year old girls. they forget. and if even if they arent screaming, 6-10 girls ages 5-7 years make a LOT of noise and horseplay even if they are trying to be calm.

 
I hate to say it, but are you sure this is a dog that belongs in a family with kids?  It's fine to say that kids "forget", but if they do, and the dog bites one of them, you have a lawsuit or a dead dog, and it doesn't seem fair to risk that.  When it gets down to dog versus kids, the dogs always lose.  It's easier to rehome a dog that *doesn't* have a history of a bite that breaks skin.
I am more inclined to say that a dog can be rehabbed if the dog does not puncture, or leave a bruise.  That's a dog with good bite inhibition - if they want to connect, they usually can.  I don't know what you mean when you say "attacks".  Some people describe a herding dog nipping at kids' heels as an attack, but it really isn't, even though the dog needs to learn that children aren't sheep!
I agree that you need to contain the dog when children are about, especially if they aren't your children.  I would have a vet check just to be on the safe side and rule out any physical issues.  Then, I would find a good positive trainer who has experience with aggression issues.  You may have to take private lessons or train your dog to wear a muzzle during a group class.
It's hard to tell you what to do without meeting the dog, but it seems you need some professional help with this.

yes spiritdogs, im sure this dog belongs in my home with my kids.  like i said he is fine with my kids and i have no intention of rehoming him.  and thats why i keep the dog in my room when company is over, to prevent the risk you are talking about.  this dogs problem is not only with children.  i wish you would reread my original post to see what the problem actually is.  this isnt a dog that has problems with kids.  he has problems with whoever he chooses to have a problem with.  there are just certain people he doesnt like.  he is actually better with kids than adults.  there is only one kid in the neighborhood that he simply doesnt like, an older teenage boy.  the only time he has problems with any other kids when they move fast and are loud.  those are obvious triggers.  however, there are lots of adults that he simply doesnt like, for no reason.  every once in a while he actually goes after someone, to attack them, and i have to hold him back.  he attacked my ex boyfriend when was over and picked up one of  the girls.  bit him on his butt.  didnt draw blood.  picking up for some reason is a trigger.  but since there is no trigger like when we re out walking and stop to talk to someone,  what im doing at present time is just  avoiding others when we re on walks and being very careful if we stop to talk to someone.   im thinking this is his chi behavior showing through now that hes been with me and my kids long enough to know hes a member of our pack, and he just has no use for other humans.

They're some book you probably could read to help you understand your dog better. One is called Chihuahuas for Dummies by: Jacqueline O'Neil and Living with a Chihuahua by: Margaret Greening. I know he isn't full Chihuahua but he still has Chihuahua in him. I would keep on placing him in your bedroom when company is over until you get his socializing, manners and temperament under control.