[debbiej]

I can understand your feelings. you have a smart, untrained teenager on your hands and you don't know her background. rotties are a lot of work, but so worth it. I have skimmed the answers to your posts, and have only a few suggestions.

get a crate. keep the dog in the crate unless she is out on a lead. she has way too much freedom right now for her level of understanding. gaining control of a smart, independent dog is a subtle thing, usually better accomplished by never letting her get in a situation where she has the "upper hand". so she should be under some kind of control all the time-kenneled, crated or leashed. an example is; she won't come when called? she never has a chance to refuse because she is on a line or lead and you can reel her in, and praise her for coming. as far as only doing things for treats, at this time, you are not her leader yet. it takes a lot of calm, consistent and fair training to convince a smart dog that you are wise enough to be the leader. so at this time, she obeys when she figures there is something in it for her. don't lavish attention on her, in fact be a little aloof to the point of ignoring her. make her sit before she gets any attention at all. she may surprise you by her reaction to this.

don't be afraid of your dog, so far the bites you have described are not of a vicious dog, but one who has not been taught manners, who is used to being the boss.

do lots and lots of obedience walks. on lead, no pulling, frequent sits. you must get yourself and this dog into some obedience classes. you need to learn how to teach the dog what you expect, and once she knows this you must learn how to correct her for not doing what you ask. but the order has to be right.

and limit her time out of her crate to time spent working or training. avoid any action that would make her feel she can't look up to you. yelling, hitting etc. work on a list of commands she must learn. and do every time she is asked. make sure you use the same word every time. sometimes dogs aren't disobeying, they just don't know what you are asking of them.

my dogs aren't barkers, I think it is unusual for rotts to be mindless barkers.

sorry this is rambling, I've been in your shoes, I'm just trying to pass along some of the information I've gleaned here myself.