I had a horrible experience with a neighbors rotti once. They use to let her lose and run free. Well my dog Daisy was in her yard and the dog came running over and attacked her. I was out there when it happened but it happened out of no where she came at Daisy. If it wasn't for my Son and Daughter and the winter spikes I had on my shoes Daisy would of been killed. We rushed Daisy to the vet and 350.00 later an open wound that could not be sewn had to heal on its own and it took 3 months. Anyways they said that there dog was just trying to play and would not pay for the vet bills.
I made a complaint to the dog warden and he said every time the dog is lose to call him so that he could document it. 3 weeks after the incident I was walking Daisy and the dog came again and tried to attack daisy but I picked her up in time and he was jumping up at me growling trying to get Daisy. I was screaming get your dog now!! He came out and said oh chill out she just wants to play with you dog. I think we should let them get to know eachother. I said are you an IDIOT I think my dog knows your dog by her 3 inch deep wound and doesn't like your dog.
I continued to call the warden it took 3 months and eventually they had the choice to go to court or get rid of their dog bc come to find out they had 3 rotties and none of them had any vaccinations or was registered.
They eventually got rid of their female that ran lose.
To this day Daisy is afraid of big dogs. So call the warden every time the dog is lose and document it on your calender. good luck