Yes, you can reworm your birds anywhere from 10-14 days after the initial worming.
I've been using Valbazen for years without resistance. Even if there were resistance, simply increase the dosage.
I do use other wormers once in awhile but not often.
Personally, I would worm the mama hen. Worm her early in the morning before sunrise when it's still dark outside.
Use a flashlight and just pull down on her wattles and her mouth will open. Using a needleless syringe, quickly shoot the 1/2ml Valbazen in her mouth and immediately release the...
Chicks can have a large roundworm infection under 12 weeks old but normally no sooner that 6 weeks old due to the worms lifecycle, then they would have to be on soil as well.
I worm chicks at 5 weeks old when temps are warm and they've been on soil. Otherwise I worm them at 6 weeks old.
It would...