Can I make a confession?
...I've never wormed... Where do I start? How often should one worm and at what age? :O
If you do not send a manure sample in for a float test and the chickens are outside on the ground, they should be wormed at 4 months old at least.Me neither......never even thought about it. I think I need to do that this week......
It is better to float test them. A sample can be sent in to UCD and the cost is about $11.00. The results come back in a couple of days.
UC DAVIS
http://www.cahfs.ucdavis.edu/index.cfm
UC DAVIS FEDEX INFO: Their account # is 364343981. If you use their account number you will get to use UC Davis's discount which is up to 70% off. They said that they will bill you for the shipment after you get the report (or at the same time.) Also, FedEx and UPS both ship to the actual lab every day... the Postal Service doesn't.
Valbazen is the wormer most recommend now for chickens. It is off label so you have to find instructions and dosage.
Let me know if you need help finding the instructions.