Like HC, I live on a suburban fringe, so get all of the city folk buying expensive property behind ours for the view over the 'country'.
Of course, these city folk turned 'country' because they now have a view of a paddock out their front window, are self proclaimed experts on livestock.
We have 2 alpacas, pretty big buggers, probably the size of fairly tall ponies.
The newest neighbour saw the boys out of his window one day, they had just been shaved so looked quite ridiculous. Neighbour thought they were horses. Called the RSPCA, saying that we had 2 severely emaciated horses on the property, so skinny that they had NO meat on their necks or legs, and had chewed each others tails off out of hunger (clearly the knee high grass is not edible for horses ;) ).
RSPCA inspectors were bent double cracking up laughing when they saw these terribly emaciated horses!!!!!!!!!!!!
I also had the RSPCA called when a neighbour saw my mare laying flat on her side in the arena, doing what she loves to do, sunbaking in the sand, fast asleep.
Neighbour told the RSPCA that she saw me shoot the horse 3 days ago but it didn't die, because it gets up and down all the time, but looks very sick.
Again, RSPCA came out, saw said mare sunbaking on the red sand, walked over to her, she slowly opens one eye, grunts and rocks to her feet and wanders off, happy as larry.
I also had the fly mask incident happen to, the neighbour knocked on the front door, and threatened to call the RSPCA if I didn't remove the 'hoodies' on my horse's faces, as they are clearly distressed. I brought out a fly mask, and showed him the mesh on it. Poor man went bright red.
Gee I love my neighbours!