There is a withdrawal period for most, but not all, meds used as dewormers. The drawback with Wazine is that all it gets rid of is roundworms and hickens can get a lot more then that. So it's pretty ineffective as a wormer. You can use the Wazine for the initial treatment and then follow up...
I did see that episode and I believe he was referring to lime which is a product of limestone. You wouldn't want to put down lye. And yes, it is a good idea to deworm your birds. Valbazen and liquid Safeguard for goats are very good products to use on chickens.