Boss gives more work to new co worker?

I have new co worker. I trained him and after six months he fought with me at work saying he knows more, alot better than me so my boss now gives him more work actually every job goes to him. Is this bad sign for me since he is now getting more work? Why is boss giving him more work? Does anyone know what could... show more I have new co worker. I trained him and after six months he fought with me at work saying he knows more, alot better than me so my boss now gives him more work actually every job goes to him. Is this bad sign for me since he is now getting more work? Why is boss giving him more work? Does anyone know what could be going on?
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