I hope it worked out for you. Putting a liquid wormer in bread is 'iffy' at best. You'll have to give a piece of wet bread, if it doesnt fall apart, to each chicken individually or others will eat it. Even if it's given individually, you'll see that not all birds will eat it.Okay... so... I've shopped for Valbazen, made a list of bantams and standard birds so I can check of who eats their bread cube! I will probably try to do this tonight... wish me luck!!!
It's always best to worm birds one at a time with a syringe without a needle. That way you know they got wormed properly.
There's nothing saying that you have to worm all 30 birds in one day. You can worm half one day, then the other half the next day. You can worm them by breed or by color or by each coop.
Start worming them just before sunrise while they are roosting. It's best to worm them on an empty stomach, before allowing them to eat. Snatch a hen off the roost and worm orally, then release her. Then grab another and repeat until they're all wormed. You'll be surprised how easy and quick it is once you get used to it.
Have someone hold the bird for you. Then pull the wattles down and her mouth will open, shoot 1/2cc in her mouth and let go of the wattles right away so she can swallow the liquid on her own. If you dont let go of the wattles right away, she could aspirate.
If they shake their head while pulling down the wattles, hang on and she'll eventually tire and then you can dose her. It helps if your syringe is preloaded and ready to go.