Well, I am posting about my two female rat sisters yet again. I have taken all the suggestions that have been made. I made sure they have food available 24/7 and fresh water. I even tried providing a box for them to hide in. They were totally freaked out by the box and just chewed it to pieces. Last night I awoke to the horrible sound of rats screaming. I turned the light on and there they were fighting and biting each other. I know that rats compete for dominance but this is just getting ridiculous. I don't know much history on these two girls. They were given to me for free. The approximate age of them is two years. The conditions that they were kept in previously was bad, a small dirty cage and they were eating a seed based diet. I have given them a bigger cage, I keep it clean, and I have them on Harland Teklad. They also get fresh fruits and veggies as treats. I am so sorry that I keep posting, but I am at the end of my rope with these ladies. I don't want them to end up hurting one another or even worse yet, kill one another.