Bloody hell, Bloodymofo, I remember that pit pony film! I was like Niagara, watching that :(
WD didn't terrify me so much, but it really haunted me for months. It was just so sad, and strange, and scary, and real. And completely unexpected! I think films/cartoons of the seventies/early eighties were a bit like that...weirdly ultra realistic, even in cartoons, if that makes sense.
I remember watching some ultra bright cartoon about a rabbit - super cute - being almost caught by a fox, but getting away. I cried my eyes out and my mum was going to let me watch WD soon, but she changed her mind sharpish!
WD is just one of those moments though, that you never forget, if affects you. I'd love to go to some kind of support group for people suffering from WD trauma ;)
With kids though, you just don't know what's going to affect them. I remember one episode of Hi-Di-Hi where someone was found floating in the pool. I was about 7 and traumatised for months. Hi-Di-Hi, ffs!
I was just saying to DH before there's no way I can watch War Horse. It's my idea of hell. Any kind of depiction of animals scared/suffering stays with me for ages. I got kind of, semi upset at the real animals used in that Zookeeper film that came out recently (not We Bought a Zoo - but the one where they talk).