Young pups will chew whatever they have to their reach, everything is a toy for them and the only way to prevent it is constant supervision and a good crate. Once the dog matures then they learn to differentiate "their toys" from "ours toys". In fact, there is no difference than giving them a fabric or plush toy and then expect them to chew our clothes. It can happen, yes, but doesn't depend on the material but in how we handle the pups.