The dun horse was probably the most straightforward, and it was just a question of mixing up the right colour of reddish brown for the body and head. The mane, hooves and fringe were all a deep brown/black.
Next I tried the spotted horse, which reminds me of a strawberry roan (I was horse-mad as a young girl, although my memory of all things equine is a little rusty now). To get the right spotted effect, I chopped up lots of white clay very finely, and then grated a few pieces of dark brown clay into it randomly. Once I was satisfied with the mix, I reformed the chopped clay into a sheet and rolled it out a few times. The brown specks were embedded throughout the clay, which gave it a mottled effect because it can be seen through the white clay. I rolled the sheet into a ball for the body, which smeared the brown even more, giving it a more natural look. I made the face using a similar technique, and added a few more tiny scraps of brown to the nose to complete the look. The mane was a mottled grey/brown/red so I roughly mixed up these colours and extruded them, which caused the strands to come out with a mottled effect.