Hello I have a three year old GSD who bit someone yesterday. We rent a house and do not have a fence so we put up a dog pulley runner that goes the length of our back yard. There is this guy who lives several houses down that has 4 jack russel terriers and our dog goes nuts whenever he sees this guy. When this man first moved in his dogs would get loose everyday and we told him that if they came into our yard the dog might do something to them and we told the man to not approach our dog either. Zeke barks alot but is friendly to ppl and plays with my kids and their friends. He has gotten loose a couple of times and was friendly to strangers. Anyhow yesterday this guy came into my yard looking for his dogs. My dog was on his runner and not running around loose and the guy came up to him. He said he did not realize how long the runner was. So when he went to walk away my dog nipped him and he had a scrape that drew blood. He said he did not even feel him bite him and did not notice the scrape til later. I felt bad for the guy but at the same time I'm irritated he came into my yard. We have very large open back yards and he could have seen if his dogs were near here without coming into my yard. I've also told him more than once that my dog does not like him. I'm just not sure what to do now. We like to take our dog places with us like the park etc. and I often take him off his runner to play fetch and run around with us in the sprinkler. Now I feel nervous. The man said if he got sick or infected he would let us know, but it was superficial. I wish I would have taken a pic of it now. I'm not sure if I should be upset with my dog since the guy came into my yard after I've told him not to. I just do not know what to do or think.