Has anyone experienced lines like this on their horse before? They are on both sides, aren’t from rain/getting rinsed, or wearing a fly sheet. They look like wrinkles, don’t brush away, and are smooth when I run my hand over. I originally thought they may be from his fly sheet, but today he didn’t need it and they were apparent when I brought him in. They are completely unnoticeable where he isn’t clipped. The vet is coming out next week for dental/vaccines so I was going to have him take a look then unless anything warrants having him out sooner.
He is totally normal on all things personality, eating/drinking/pooping/peeing.