First, you have in your hands a teenage dog not a puppy anymore and just like human teenagers at this age dogs experiment and are more likely to get into trouble. My advice is to do some basic obedience so that she learns the human social norms. She obviously doesn't have a concept of whats socially acceptable in the human world and its acting like a dog. Its not that she is a bad dog she just has not yet mastered how to live in harmony with you; she needs more guidance from your part.

Second, whats her breed? at this age some female dogs become less tolerant with other dogs (theres a reason why we call them bitches). If it is becoming a big problem separate them at times when you can't supervise them. Doing crate training will come in handy at this point especially since she is not house trained. Supervise her and try to see what her triggers are (what makes her go after other dogs) so that you can better predict the fights, They might be very small triggers so pay close attention and if you're having problems pin pointing them I suggest you invest in a private lesson with a professional trainer. As a trainer we have develop that eye at observing dog behavior.

Hope this helps!

r trigger for the most part is possessiveness. She is so protective of me that she doesn't want to share me with the others. I'm uncertain about her breed. She was supposed to be a Chihuahua, so I believe that her mother must be Chihuahua. She is built like a minature pincher, has a beautiful sleek body, short hair. She doesn't have a pretty face due to the color spacing, but she insists on being the favorite pet. LOL I know its not advised but we swat her with newspapers, flyswats, etc. when she is behaving so badly and refuses to stop. We really can't afford to take her to a trainer.unless I'm mistaken about the price. On the older males she licks them in the face and they growl threateningly prompting her to lie down and act passive. But the Cairn Terrier is at her mercy. She is constantly jumping him and biting him but not hard enough to actually cause any damage. He just takes it in his stride. He's the best natured dog we've ever seen. I am disabled and sit in my recliner when I'm not on the computer. Princess wedges herself in beside me and takes a a nap. There is room for two of the small dogs to sit oon the footrest, but when they try to join us she goes ballistic, snarling, growling and biting, she has bit my husband when he tried to stop her. She threatens me but doesn't bite. I have never had a dog that behaved in this manner. Any suggestions?

I also reccomend obedience training ASAP

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K9 Trainer in SoCal

"LOL I know its not advised but we swat her with newspapers, flyswats, etc. when she is behaving so badly and refuses to stop"

Listen.  There are many very specific reasons why striking your dog is not recommended.  Smacking her teaches her that you are dangerous, unpredictable, and not to be trusted.  Please stop hitting her.

Set your dogs up for success by  managing the situation.  Do not allow any episodes of possessiveness.  Do not let any of your dogs have valuable chewy toys when other dogs are around.  Crate them or separate then so that they can enjoy their food and chewies in peace without threat.

Your female needs a structured, positive leadership program such as NILIF (Nothing in Life is Free).  This is not a punishing program for her - rather, it will show her who controls the Good Stuff (you) and  that in order to get what she wants, she must do what you want.

http://k9deb.com/nilif

 

Please start this program with her today.  There is a lot of information on that page that will show you how to work with her positively.  Again, you are suppressing her behaviors by punishing, but you are not teaching her a thing.  You will certainly earn yourself a bad bite if this continues.  Good luck - 

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"Your dog is a reflection of your abilities as a trainer." - Susan Garrett