worms on vent

Sounds like an old wives tale to me.  I have never heard of it. I would use the proper stuff I have found there are no short cuts when it comes to animal health.

There are many that swear by the Cayenne pepper and also DE but it must be used as a prevention, not a cure.

 The life cycle of a worm goes like this. An adult worm gives off eggs which are deposited in the feces. Once there it can be injested by another bird. When this occurs the eggs hatch and then the larvea move to the intestines to grow up.

 If your bird is shedding adult worms the infestation is heavy. So heavy in fact that there is not enough surface area in the intestinal wall to support the numbers. Hit the bird with the Wazine-17 first and do a repeat treatment in 14 days. Wait another 7 days after that and use some Ivermec to take care of all the other types of worms the birds may have. No repeat treatment with the Ivermec.