Hi Carol,

That's a shame your dog has been bitten in the past and can understand that this may make him fearful of new dogs he meets.

However I don't think that stopping him from socialising with other dogs will help the situation and may even make him aggressive in the long run.

Perhaps a way to re-introduce him to new dogs would be to join a club, maybe not training classes but agility or something fun like that. This way he is meeting new dogs in a controlled but fun environment.

Hope this is of some help.