my once loving, obedient 8 year old has turned into Kevin the Teenager in the past few weeks, he's like a completely different kid back answering, being cheeky and rude, if I ask him something he'll say something like "what's my usual answer to this? well then" it makes me so cross, I have enough trouble with his younger brother (behavioural problems) without him starting up too...he's violent (always attacking his brother for no reason), constantly tries to annoy people, if I ask him to do something he responds with "why dont you?"...he never used to be like this. Today he blurted out to my friend "you're real small!" .
Is it his age or something else??