Yes. Valbazen is best used as a first time wormer as it slowly kills worms over several days preventing blockages if there's an infestation of large roundworms. It also kills all known types of worms a chicken can get.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Safeguard liquid goat wormer (fenbendazole) is used off-label in chickens. Most older posts said to give 1/2 ml orally and repeat in 10days which would get the round worms and probably cecal worms. But if there could be the more complicated worms such as gapeworm or capillary worms, then a larger dose given for 3 days (for gapeworm) and 5 days (for capillary worms.) In many posts by Casportpony, she instructed most people to give it the maximum amount 23mg per lb for 5 days in a row since most don't know what worms their chickens have. I usually just round that off to 1/4 ml per pound, and give for 3-5 days.
It helps to not read posts that are too old about worms, since drugs and dosages have been updated. Sticking with threads that have been posted in the last 2 years are usually better.