I posted on an actual rat forum and no one responded so I figured I would ask my question here. I have two female ratties that are sisters. One is hairless and the other has fur. I just recently changed their diet to Harland Teklad lab blocks. I only give them a small amount of food each day. Well, my question is this, why is my hairless rat annoying and bickering with her furry sister? Yesterday she was just relentless and would not leave her sister alone and the furry rat was verbally protesting. This behavior has only started since I changed their diet and cut them back on the amount of food that I give them. Any input is greatly appreciated.