Handfeeding is a very neat experience to help your dragon calm down. My first dragon was 7 inches long when I got him and he liked to flare out and hiss at me also. I just kept handling him everyday and soon enough he calmed down and was just a little angel. Also, some dragons grow quicker than others. Some have dragons that are a year old and only 14 inches long... and then I have a male that is 8 months old and 18 inches long, it all really depends on genetics. As far as sexing your dragon goes... go to
http://www.dachiu.com and click on Sexing your dragon. If it is 14 inches long then it should be ok to make a pretty good guess. Though some dragons are tougher to sex than others. Good luck!