I got a kitten at 9 weeks old a few months ago and all was fine he now goes outdoors etc. Now last week i bought another 9 week old kitten as i thought smarties (5 months now) would like a playmate as he seems ok with any cats that come into the garden (although i dont sit and watch for hours). I probably introduced them all wrong but i cant change that now but it seems they hate each other! Coco (the 9 week old) seems to be a wind up, chasing smarties tail etc etc. Smarties appears to play too but then it gets rough and the smallest, coco starts meowing as if he doesnt like it. I'm too worried now to 'let them get on with it' as i fear it may go to far... Could someone shed some light on what to do? Am i reading the behaviour wrong? Thanks