Hello, I'm new to this whole forum thing so bear with me. I have a adolescent pacman frog at the moment, and i think he may have a very small build up forming. I can only just barely see it (if he isn't annoyed with me poking around in his terrarium and puffed up) and only just barely feel it. He's still eating, and i only bring this up because every case of impaction i've read says their little guy stopped eating.

I changed his substrate about 5-7 days ago and cant find any poop, he's been fed 2 meals of about 6 large crickets in that time span and just ate 3 now. Any help would be great, I could be just paranoid who knows. Thanks in advance!