I am fostering a puppy that was found tied to a post. She lived in another home for a short while but was uncontrollable so was sent to a shelter. I've had multiple dogs (up to 5) for more than 25 years and i've never had a dog quite like her. When she arrived she was uber aggressive even though she was only around 3 months. I quickly learned NOT to say No to her--she hates that word and goes berserk. Instead, i usually say, can you be my good girl, please?, and she usually will stop whatever bad thing she is doing. However, sometimes she still goes berserk when she can't have her way. Unfortunately, she is super smart and quickly picked up on the fact that peeing in the house upsets me. So when she is mad, she pees in front of me. For instance, she has food aggression issues. She had a chewy and my timid dog Daisy, also had a chew. The puppy only wants Daisy's chew, so i separate them. Somehow the puppy got into the room where Daisy was eating her chew (i could hear growling) so i went in, picked up the puppy, put her down outside the door and closed the door without saying anything. She looked at me and then walked down the flight of stairs making sure she peed on all 12 steps. She and i had just been out for a half hour walk (i walk them every 3 hours in the day). I've never been a crate trainer, but i tried to use one with her in the beginning and she would not tolerate it. She howled non-stop and it made her very aggressive. I usually never let dogs sleep with me, but that was the only thing that kept her calm and quiet when she first arrived. Now, i use the crate only when i'm at my wits end (like she is biting me and barking furiously while i'm trying to fill the dog bowls with food). Usually, she will calm down after i put her in the crate, as long as i don't leave her in there for more than a few minutes (10-15 at the most.) She has learned that i won't take her out until she is quiet. If i leave her in for any longer she goes berserk. My question is, how do i break her aggression? She definitely does not react well to aggression in return, so i am very careful to be positive with her, but sometimes she is just awful and out of control. I know she has had a rough beginning, and i'm trying to turn her around so she can find a loving forever home. And i know most people won't have the patience i've had with her. Thanks for your advice.