Arms

I allwais think that, the Horse-fursuit is most dificult yet.
your fursuit is like a comic horse, or like a real horse???

1) in an hipotetical event of a horse comic:
try with the tipical glove, "with four fingers"
2) or horse like a real: is most dificult, can make hooves in wood+paint+epoxic resine... or can buy it.
now, you need use your hands, to this can you make under the hoove an space for your hands, an other idea is make hooves like goat, because are more flexible.
or try with this method "to me is anti-commodity"

http://www.unicorn-dream.co.uk/hooves2.html

good luck... =3

I saw a very nice picture just a couple of days ago. The artist drew an anthropomorphic horse with rear hooves but the hands were 2 large fingers with a much smaller thumb. I think that is a neat concept because one could still grasp items.

Another idea would be to make a glove with hoof cowl around the hand. This way if your arms were hanging you could curl your fingers and have them appear hooflike, but if you needed to grasp something you could uncurl your fingers.