Why are lion cubs not injured when carried by their mothers by being bitten with their teeth?
The answer: because the mother lion doesn’t actually position its teeth to bite, but is more like a gate that holds an object from falling, the mother’s teeth are more or less positioned like this:
It’s different when a lion is on the verge of preying or biting, then its teeth are in a tight position and pinch the target, as in the photo below: