How do I get my bunny to quit chewing her harness or leash?

i got one that was expecialy made for a rabbit it's covers more of his body like a shirt. You need to wach him so you can stop him from chewing it. he should never be unsupervised in it. My leash is thicker too with material sewn around elastic so he can't just bite trough it and I can stop him before he dose damage. So long as you are supervising him, it is safe. You could also try a bitter apple spray.