A common animal that many artists don’t draw well is the horse. I suspect that’s because it’s an animal most of us are familiar with because we’ve seen it on television many times but rarely encounter the critter in person. We see cats and dogs on a regular basis but horses are not a regular part of most American’s lives.
Horses are herbivores. They’ve evolved to walk on a single toe. Once I realized that I didn’t know how to draw a horse from memory I avoided drawing them for a long time.