Beautiful work! I love the horsehair burnt into the sculpture - I have some (purchased) pieces like that. If I had a kiln, I'd try it myself.
I have a suggestion, since you said "C&C appreciated." The Arabian's head is dropped so low, he's looking at the ground. I know that sculptures in water-based clay can sag while drying. When I was doing water-based clay (many years ago), I learned that I could make a column of clay and put it underneath parts I didn't want to sag (in my case, two columns, one each under the front legs of a rearing pony). If the clay isn't blended with the clay of the sculpture, it won't stick to it. Keeping the column in place until the sculpture is almost leather-hard will keep the head more upright and you can still repair the part that was leaning on the column at that stage if it needs repair. (Rubbing with the back of a spoon was all I needed to do for my pony's front hooves.)
This was my 3rd or 4th sculpture after I started sculpting at age 43. The pony is rearing because he's noticed a prairie dog at the right edge of the picture. Sorry I didn't think to dust the glass of the display case before taking the picture!
You do beautiful work! I hope my suggestion is helpful.