I have a normal that is supposed to be 2 or 3 years old that I got from a lady. The snake was only 206 grams when I got it last year in October. Under my care it now weighs 563 grams. This particular snake always strikes the glass when it comes time to be fed. I am feeding two small adult mice as that is all that this snake will eat for me. It will not take f/t anymore and I have tried live rats as well. I covered three sides of the tank with decorative background and the front as well with some cardboard. This seems to have calmed the snake down quite a bit. Your snake sounds like it is a little stressed out. What kind of enclosure is it housed in? What are the hot and cold side temperatures? How are you heating the enclosure?