Teeth

[Huckleberry]

One of my yearlings has a new tooth coming in, only the old one or part of it is still in place. I noticed him favoring his mouth and acting weird about it the last couple days. I tried to look and it appears a new tooth is coming in behind or under the old one. The old one looks broken or like a partial tooth (?) He didn't let me get a good look, will try again tomorrow. He's eating fine, I just thought the old one would have fallen out first? Any need to intervene or just let it take it's course?