Yeah i check it with a digital....my problem is when i try to check it he gets all mr. tough guy and i don't want to stress him out to much....he gapes alot but looks happy as can be...he just got done eating 20 maybe more i lost count crickets and i'm sure would have kept going...but i just want to make sure he goes the the bathroom soon...also i bumped up the crickets the the adult size at the pet shop just got alittle bit cause i wanted to make sure he would eat them and he takes them down like a CHAMP!