Pac-Man Frog Opening it’s Mouth

[ReignofInvertebrates]

So yesterday I fed my Pac-Man frog (not sure of the exact age, but it’s small, I got it in May of this year). Nothing went different than previous feedings. The cricket was around the size of the length between its eyes. Well, today I noticed that my frog is occasionally opening its mouth briefly before closing it again. It closes shut tight (no MBD or anything) and he seems to be in otherwise fine health. Is this normal for them to do after feeding? Is it part of their digestion?

 

[Liquifin]

It's a habit that some pacman frogs do. If you're talking about when they slowly open their mouths and close it again, then yes, it's just a habit and nothing wrong.