Hi, i have a 12wk old collie and she is chewing on my table legs alot!....?

Can anyone give me advice on anything that i can use that will not harm her but prevent her from chewing through them! When i was a child i lived on a farm and my mum used to blow out chicken eggs and fill them with mustard to deter our dog eating the chicken eggs, is there anything along those lines that will stop her gnawing at my poor table! She has got a few hard toys already to chew on but it doesnt stop her when we are not looking.