Like Nick said, dogs shit on pavements and in town centers, etc. and their shit is made up of meat mainly. My parents rides their horses in and around a little village near here and all their horses eat are grass, hay, and vegetable based stuff that my parents make them. Also, are you telling me you'd happily wait for a horse owner in the middle of the road to get off their horse and pick up the poo? I very much doubt it. Also where the f**k are they supposed to put it, you can put dog shit in a carrier bag, horses shit a lot more than a dog! My parents pick up as much of the shit as they can from their field to keep it clean, so don't assume horse owners aren't responsible. My mum's a teacher but she always goes to see the horses after work, she takes her other car if she doesnt need to feed the horses. Thank you Ooooh how about a few of my pet hates: Ignorant people, arrogant people, compulsive liars, people who don't text back (although I have a habit of doing that)