Unless you saw them in that same place the next day, meaning they lived there, that's not a problem. My horse spends quite a lot of time in a small yard, probably because I feed him in those yards. I wouldn't worry about those horses.That was definately the right thing to do... My friend's neighbour had a dog and they had it operated on to have it's voice box pulled out so It couldn't bark at all... I told her to call the RSPCA But she didn't and I was going to. And I once saw these I think It was 2 horses and they were in a tiny space with a bucket of water and a 1 thingy of hay. But I'm sure the owners would put more food and water there for them.It's sad that people do that. And not do anything about It. You did the right thing... Trust me