My dog is super friendly with people but hates most other dogs and will go for them if they come up to him. Obviously I put him on a lead when we see another dog, but because he is little and cute people just let their dogs run up to him, despite me asking them not to, then of course he goes for them and I'm the bad dog owner. I did once see a harness & lead set which said something like 'do not approach' - think it was designed for rescue dogs. Has anyone seen anything like this or has any good ideas?