When I got my horse Andie who is 4. My mom's friend came over to look at her and noticed how her forehead came out a little. She said that meant she was going to be stubborn (Which she is lol) She said something about Andie having a loose bottom lip but she couldn't remember what it mean. I'll try to post a picture if I can.
I'm just curious because she does always have a lose or relaxed bottom lip that kinda droops open a little. She's not sick or hurt-it's just the way her lip is lol