I soon plan on de-worming my chickens with Valbazen, however, I was also planning to treat for mites using Eprinex pour on (.2 ml topically applied to bare skin at the base of the neck). Since there is no egg withdrawal using the Eprinex, should I wait until I've finished de-worming with Valbazen? Or, okay to do both at the same time? Don't want to possibly overdose them on wormer. Thanks!