I Don't Understand Why You Keep Putting Me Outside

Meet Miss Sarah (as in Sarah Palin and the whole lipstick on a pit bull thing). She is the newest member of our household...maybe. I found her and her buddy at a service station on a busy road dragging chains behind them. What can I say - I'm a sucker so I loaded up both of them and brought them home. One night was all it took for me to realize there was just no way I could keep both...even for one more night. So we decided to try and make Miss Sarah a part of the family. She is probably about 6-8 months old and full of energy. She gets in trouble for: chasing Cessie, barking in the house, jumping up on us (and everyone she sees), leaping from chair to sofa and back again without her feet ever touching the floor, putting her paws on the counter to see what is up there, sniffing at the garbage can and eating out of Pete or Cessie's food bowl. Her worst trait is food aggression. Food aggression is not tolerated in this household. We are working on it but until I think it is "conquered", she will not be allowed to be alone with Cessie. I'm not that worried about her being alone with Pete - he will very calmly put her in her place. Not sure how he does it but he is like that with all the neighborhood dogs - they just know he's the boss although I've never seen him be ugly with them. But this isn't about Pete, it is about Miss Sarah. Wish the best for her - if she doesn't shape up, she's shipping out. I hope she shapes up - she is the sweetest, most cuddly lapdog you have ever seen. She just loves to cuddle.