Ebony, yes, I have literally watched a cricket bite my frogs leg. She jerked away immediately and thats only one reason why I remove them if she hasnt eaten them within a half hour or so. A second reason I remove them is because if I have a dish of waxworms in there for the frog, the crickets will chew them up as well. And finally the third reason I take them out is because they S**T everywhere!!! Maybe the joke is on me, and our pet store only carries evil mutant crickets, but this has been my experience.