He is now on paper towels due to mites so it's not a piece of bark stuck in his mouth. It would be weird for him to yawn this much. It can last like 30 seconds or more and it's repeated then ... never seen a ball yawn like that. Usually they just spread their mouth and close, this one looks like realigning his jaw... left, right left right again ... and then he stops.
It's not about eating i think. He ate 4 days ago.