[woodman]

All those animals were domesticated for very different reasons. I've spent a lot of time with horses, my family had three, and they're great animals - but they don't come anywhere close to dogs when it comes to trust and the ability to read people. I've seen dogs trained with nothing more than praise - the desire to please is that strong for them. That doesn't work for horses.

[cmdrfred]

I've owned horses too. It depends on what you want them to do. If you want to jump on their back and ride them around, sure. I don't do that personally, and while they don't read you like a dog can I've taken unsocialized "mean" horses and turned them into friendly companion horses with nothing but patience and the occasional cookie or carrot.