Quote:
Be cautious if they are less than 18 weeks old, as wormers are very hard on hens. It is really not recommended to worm less than 18 weeks old according to what I've read on here. However, my wazine bottle does give a dose for 4-6 week olds as well as adults.
If you are treating for roundworms then Wazine will work. There are other wormers some are using off-label in order to kill other types of worms.
If you are interested in off-label wormers, then search BYC for valbazen. However, be aware that wormers have an "egg withdrawal time" that you must observe where you toss the eggs.
Also, you said they are molting. Molting and worming together will be VERY hard on your hens. So, some vets will do a fecal test for worms for a small fee. You might consider that.