My 2yo son has changed from a very well behaved lad to a monster. I was so proud of his behaviour before, now he is a nightmare. He smacks his older brother alot. He takes toys off him and snatches. I am finding discipline a problem. Its like he doesnt care. I have tried the naughty step. He just plays with the shoes out there. Have no where else to put the shoes by the way.His favourite word is no!!! Need to find a discipline that works and stick to it. Help please my poor 6yo who is bullied by him and me for listening to the comotion!