Here's one I did of my daughter's pony. Sorry it's so big...I tried to make it smaller. The colors got kinda messed up when I uploaded it, and his nose is too big...looks like a horse with little ears. Oh well. I'm working on one now of his pasture mate in acrylics but all there is is a background and a horse form. If and when I finish it I'll post it.
Because that was one of my first paintings, it took me about 50-60 hours. It all depends on how skilled you are and how much detail you put into it. I don't know why God gave me the eye for detail because I'm so impatient!