I have a reactive rescue that has to be walked on lead. He's my third reactive dog so I have some experience of this. One was an elderly ex street dog who was so reactive he simply couldn't be walked in public.he lived out his days pottering round the garden with walks round the block at night. The second was a large, bad tempered bitch, lovely with people but horrendous with other dogs - she was ok so long as she was muzzled, which we did. The current boy is a terrier, so small enough to pick up and march him past other dogs he takes against (only un neutered males in his case). He's never off lead as he would go for one as soon as he scented it. When I see his body language we usually change direction sharpish, or I pick him up and march swiftly past saying "sorry, rescue with issues" with a smile.
If, as the owner of a reactive dog, I CHOOSE to take that dog for a walk where other dogs are off lead then it is MY responsibility to keep that dog under control - not the owners of perfectly nice dogs who are simply socialising as nice dogs do.
My dog is my responsibility, no one else's. If we are unlucky enough to have a reactive we have to find a way to keep that dog happy and healthy. We don't get to dictate to other owners that they should keep their dogs on leads ffs.
If you don't want off lead dogs approaching yours then the ONLY way to ensure that is either not to walk them in public, or only walk them in and around towns. Avoid leafy country walks and parks. Is that a pain? Makes your walk less enjoyable? Tough. You are responsible for your dog. No one else is. Honestly the sense of entitlement from some people on here is off the scale.
Some people seem to think their desire for a nice walk trumps their reactive dog's need to be kept under threshold or their traumatised dogs need for safe space.
Your dogs are being put into a traumatic situation by YOU insisting it goes places where you KNOW it will encounter other dogs who will cause it distress. Frankly I think that's irresponsible. If my reactive boy was reactive to all other dogs I simply would not walk him in public, nor would I if I had a scared dog who cowered from every dog it met. it's just not fair to them.