An elderly relative has a dog which is frankly a bit much for them. They mostly pay a specialist reactive dog walker to take it out.
A lot of effort has gone into trying to train it and it is much calmer than it was, but occasionally it reacts badly to something at random.
3 times in the last 5 years it's bitten a person. Once was a jogger that ran quite close to it. Once was someone making a noise it didn't like nearby. This time, it saw a type of dog it doesn't like, on a lead. The dog walker grabbed it, but it slipped away and went for the dog on the lead. The dog walker got bitten.
The owner seems to think it's just one of those things. None of the bitten people have ever made a fuss or wanted to pursue it further.
It just feels wrong to me to just accept it and risk it happening again with potentially greater consequences. But there isn't really anything that can be tried that hasn't been tried already.
I walk it very rarely, and when I do, keep it on a lead and bring it close to me if anyone else is around. But I am not sure it is at all safe to be out. I guess a muzzle? Or should it be put down if it is randomly unpredictable?