I have had several pacs, and they all have this behavior. After they eat something, they open and close their mouth for a few seconds.

I noticed my one ornate, when doing this now, is not a smooth motion like the others, I dont know how to explain it, but his mouth does not open and close smoothly, it kind of jitters as it opens and closes.

He seems healthy other wise, and eats fine. Sometimes he would do this then after a while it would smooth out and go back to normal. Other times he would keep doing it "jittery" untill he stops.

What could this be a sign off? I know it cant be good