Tips or Advice for a jealous little Cavalier

[afoley]

Hi all,

When I go walking with my Cavalier King Charles, if another dog comes near me, he tends to get very jealous and growls, even sometimes going in for an attack. He has no fear of any sort height or type of dog so of course I'm naturally worried he's going to start on the wrong dog one of these days. He's not castrated so I have a feeling it's just male hormones and he likes to act the big boy but I don't like to see him behave in this way. Any tips or advice on what I can do? I always tug at his collar/leash and voice my disapproval with him but it doesn't work.

Thanks for anything you can share with me.

Aishling