Thank you ajshep for your comments and advice

Tory we got him at eight weeks old as the farmer was going to shot him due to his white head he is great around my severlly handicapped son and never ever shows any agression towards him atall ,like i said maybe i am just over reacting to tonight with the brush but he was like this 2 weeks ago when the gas man came to the house he kept backing away although his tail was wagging all the time and not between his legs as soon as the man went to leave he jumped all over him licking his face

he is fantastic with our older collie aswell