OK, a bit of a long story.  tl;dr at the bottom.  FYI for clarity, the story involves 4 men (all gay) and a dog.

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So  my best friend lives across the street and his boyfriend has a dog.  My  friend's boyfriend's dog are there at least 50% of the time, and I see  all of them a lot.  The dog is a puppy, cute and very hyper.  You can  hear the dog crying from one house to another a lot, when the owner is  away.

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A  few months ago, the dog was hit by a car.  I help find a vet, rush the  dog there and stayed with the owner.  Also in the past my friend, his  boyfriend (the dog owner) and the dog have been at my place (without me  being there) to use the hot tub.  The dog has chewed up some rubber  ducks from the hot tub, and shit in my yard in the past.  From the hot  tub, the dog my have left muddy prints in my house.  No big deal, it's  part of owning a dog.  I get it.  On two occasions in the past, I have  taken the dog running.  Once by myself, which involved a 2 mile drive  then a 7 mile run in public.  It's pretty much assumed other people are  petting the dog.  Because, as I said, it's a cute puppy and the dog  craves attention.  It's very sweet and has never hurt anyone or any dog ever  in the past ever.  Not even barked.

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So  I have a guest in town that I have a romantic interest in.  Everyone  knows that.  I took the day off work and my guest and I visited my  neighbor friend across the street.  My friend/neighbor works from home,  and he briefly said something like "the dog wants attention" and that he  was working at the moment in a group text.  I offer to take my friend's  boyfriend's dog to a walk in the greenbelt near by.  It's a walk 5  blocks away to a heavily wooded trail area.  We were gone 30 minutes or  so.

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OK,  I get it.  I should have texted permission from the dog owner, not have  gotten permission from the dog owner's boyfriend.  They both have dogs  and are a committed couple.  My friend didn't see any issue with this, and got the leash etc. etc.  The dog owner himself has a history of  overreacting. Even he would admit such.  

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So, he loses his shit because his  dog is about a couple miles away in a safe, wooded area on a leash the  whole time.  His only real concern (his own words) is the dog could hurt someone.   Before I even took the dog out, the dog owner's boyfriend said in a  group text "\[Dog\] sure could use some company he's bored out of his mind  watching me work" and when the owner blew up, his boyfriend (my friend) texted  "He's fine, This is fine".  But then the dog owner himself then texts "Why is my child  (the dog) with that ratchet man (my guest)?"

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Dog  is returned safe and sound.  Still, the dog  owner rushes out of work  to our place.  Comes over to my house, I apologize in person.  But, still unhappy, he races  away in his car, pissed off.  Later that night the owner sends another  group text reading me the riot act.  He mentions my romantic interest  and says "My dog is not a 'cute' little thing you can use to gain points  with whomever you are fucking for a few days".

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LT;DR  - I walk a dog I spend a lot of time. The dog was a couple of miles  away tops, with the permission of dog owner's boyfriend,( but not the  dog owner).  No one was hurt in any way.  I get read the riot act, and  the dog owner personally attacks me and someone I'm seeing for it.