The farrier came out today and noticed it, saying that it looked like he had teeth coming in. Never having had a young horse like this before, I had no idea this was something that might result from incoming teeth. He seemed to say that they would go away.
I'm just wondering, is this really normal? Have other people seen this in the past? Will it go away? Should I be concerned?
For the record, he had a dental exam with the vet last April. The vet evened out his teeth a little, but didn't seem to think that anything was out of the ordinary.
Here are pictures. The first is from today, and I've highlighted the area of concern with the red box. The second is from last November, where you can hopefully see (despite the halter) that the area is normally flatter and straighter.