Yes JustinR. Wazine is a mild wormer that only paralyzes roundworms. Since chickens have many diffrent kinds of worms,especially if they free range, you dont want to use ivermectin or safeguard first because they kill all those different type of worms (except tapeworms.) The overload of dead worms in the chickens system will poison and kill the chicken. Using wazine first gets rid of one type, roundworm, reducing the wormload in the chicken. Then in 10-14 days use ivermectin or safeguard to kill roundworm larva that have grown from eggs in the chickens system since the wazine usage. The ivermectin and safeguard will not only kill the roundworm larva, they also kill gapeworm and several other types of worms. I use ivermectin pour on, it not only kills all those worms, but it also kills lice and mites on chickens. Remember, ivermectin and safeguard are off label and used for cattle, horses,goats. For tapeworms I use valbazen for sheep or goats or zimectrin gold for horses can be used. I prefer the valbazen.