cat biting his brother on the neck

Question
I have "twin" males from the same litter.  They are almost two years old.  The dominant male who loves affection and demands all the attention gets on top of his submissive brother and bites him on the neck.  He only lets go when I catch him and yell at him.  He has been doing this more often now and I wonder if it is because I have been giving the submissive one more play time lately.  Why is he biting his brother and how can I make him stop?  

Thanks!

Answer
Biting is unaccepatbel behavior, whatever the reason. You should try and give both cats equal attention, but certainly you shouold never let his biting control your behavior. Then he has gotten what he intended and has learned that biting works for him. So, fo rthe most part, you should not change anything you are doing as far as who gets attention - he needs to be trained not to bite regardless of the circumstances. I say for the most part with one caveat; sometimes aggressive bahavior in a cat can be triggered by overstimulation. You think its just playing and everything is fine and suddenly he's had enough and decides to bite what or whoever is close by. This can happen during play with his brother and you bascially need to separate them until he calms down. You also need to take the matter under control and make the effort needed in order to teach him to stop biting. You need to be vigilant; when he bites you will need to intervene. Abruptly ending a play session is an extremely powerful reprimand. With a few repetitions, kitty will learn that it is his own overly rambunctious or aggressive behavior that brings an end to all the fun. If you can redirect him to a toy to play with that could help. And you do have to be conscious of the other cat and be sure he'[s not really getting hurt. It is nornal in a sense for their to be dominant behavior. But you need to be the monitor. If it means keeping the two cats in separate rooms for a while until Mr. Agressive learns that he is ruinging fund time with his roughness, then that is what you have to do. To start, try just spearating them by pushing him away with a loud reprimand, NO! Unfortunately it seems he's been doing this for a while without having learned his lesson earlier on so it will take more effort on your part now. You must be consistent; use discipline, loud reprimens, separation, and distraction. NEVER hit. That won't help at all.
Also, please read this article aboutr cat behavior:
http://www.perfectpaws.com/help2.html
It does recommend a medication in extreme cases of agression. But that is something for a last resort and which you must discuss in depth with your vet.