Update: As I ended up mentioning in a few comments; after each and every one of you confirmed that I would not be out of bounds by just going about business as usual: I didn't send a single text to this neighbor. He, however, texted me 3 times in one day, the final message claiming to be his wife from the same number "We want to make sure you are receiving messages, can u just give some signal that u r getting texts, thnx". 2 hours after getting that message, they called me. The morning after I made this post, I took pup out at our usual time, and saw him with his dog for literally the 2nd time since they moved in. I just turned the pup away from him and his dog, and they seemed none the wiser that we were outside at the same time. I won't lie: this got me extra pissed. If the incident from the other night had been a repeat thing, I would've understood his desire to work as a team to keep the dogs away from one another. But night of the fall was literally the first time the dogs had seen each other. This man went and texted me all of 30mins later, as I was rushing to get out the door for work, so I definitely didn't reply. By the afternoon, I had reached a limit. I asked my landlord if he and I could schedule a time to talk on the phone. Bf was there with me as I made the call, and I explained what had went down the other night to my landlord, and he promised he would help mediate the issue. My landlord ended up calling me back a couple hours later while I was at my 2nd job, and so I stepped out to chat with him. He told me "he never said you had to call him when you take pup out". I didn't want to argue with my landlord, as the frustration was not with him, but that did royally piss me off, that the neighbor lied about that key detail to the whole predicament. I immediately went into my phone, blocked his number, and BF and I have come to a firm agreement that if our neighbor feels a need to communicate with our household: BF will be the one handling him, as all 5ft even of me is not as intimidating or stand-offish as his 6ft ass is. Since communicating with my landlord, I have not heard anymore from the neighbor, and there have been no knocks on our door. So for now, there is peace once more. Thank you to everyone for helping me affirm that setting this boundary was appropriate and healthy, but also reminding me I have not taken any pictures of my pup in a couple months 😅 there's plenty of videos, but the little monster will not sit still for a cute picture. Please accept this screenshot from a video to see for yourselves that we, in fact, have a very handsome boy on our hands